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Finding the Fourth Proportional to 39,940.54, 59,917.86 and 13,639.12

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Solution

The fourth proportional to 39,940.54, 59,917.86 and 13,639.12 is: 20,461.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,940.54 : 59,917.86 = 13,639.12 : x
  2. Step 2: Convert to fraction form
    39,940.54/59,917.86 = 13,639.12/x
  3. Step 3: Cross multiply
    39,940.54x = 59,917.86 × 13,639.12
  4. Step 4: Simplify right side
    39,940.54x = 817,226,882.68
  5. Step 5: Solve for x
    x = 817,226,882.68/39,940.54
  6. Step 6: Final answer
    x = 20,461.09

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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.