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Finding the Fourth Proportional to 39,920.68, 59,893.80 and 11,840.92

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Solution

The fourth proportional to 39,920.68, 59,893.80 and 11,840.92 is: 17,765.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,920.68 : 59,893.80 = 11,840.92 : x
  2. Step 2: Convert to fraction form
    39,920.68/59,893.80 = 11,840.92/x
  3. Step 3: Cross multiply
    39,920.68x = 59,893.80 × 11,840.92
  4. Step 4: Simplify right side
    39,920.68x = 709,197,694.30
  5. Step 5: Solve for x
    x = 709,197,694.30/39,920.68
  6. Step 6: Final answer
    x = 17,765.17

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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.