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Finding the Fourth Proportional to 13,407,775.80, 20,111,663.70 and 4,888,390.20

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Solution

The fourth proportional to 13,407,775.80, 20,111,663.70 and 4,888,390.20 is: 7,332,585.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,407,775.80 : 20,111,663.70 = 4,888,390.20 : x
  2. Step 2: Convert to fraction form
    13,407,775.80/20,111,663.70 = 4,888,390.20/x
  3. Step 3: Cross multiply
    13,407,775.80x = 20,111,663.70 × 4,888,390.20
  4. Step 4: Simplify right side
    13,407,775.80x = 98,313,659,736,775.73
  5. Step 5: Solve for x
    x = 98,313,659,736,775.73/13,407,775.80
  6. Step 6: Final answer
    x = 7,332,585.30

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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.