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Finding the Fourth Proportional to 51,047.81, 76,571.70 and 15,990.20

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Solution

The fourth proportional to 51,047.81, 76,571.70 and 15,990.20 is: 23,985.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,047.81 : 76,571.70 = 15,990.20 : x
  2. Step 2: Convert to fraction form
    51,047.81/76,571.70 = 15,990.20/x
  3. Step 3: Cross multiply
    51,047.81x = 76,571.70 × 15,990.20
  4. Step 4: Simplify right side
    51,047.81x = 1,224,396,414.48
  5. Step 5: Solve for x
    x = 1,224,396,414.48/51,047.81
  6. Step 6: Final answer
    x = 23,985.29

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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.