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Finding the Fourth Proportional to 13,407,769.80, 20,111,654.70 and 7,019,980.20

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Solution

The fourth proportional to 13,407,769.80, 20,111,654.70 and 7,019,980.20 is: 10,529,970.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,407,769.80 : 20,111,654.70 = 7,019,980.20 : x
  2. Step 2: Convert to fraction form
    13,407,769.80/20,111,654.70 = 7,019,980.20/x
  3. Step 3: Cross multiply
    13,407,769.80x = 20,111,654.70 × 7,019,980.20
  4. Step 4: Simplify right side
    13,407,769.80x = 141,183,417,783,236.94
  5. Step 5: Solve for x
    x = 141,183,417,783,236.94/13,407,769.80
  6. Step 6: Final answer
    x = 10,529,970.30

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.