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Finding the Fourth Proportional to 39,400.90, 59,101.35 and 18,664.90

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Solution

The fourth proportional to 39,400.90, 59,101.35 and 18,664.90 is: 27,997.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,400.90 : 59,101.35 = 18,664.90 : x
  2. Step 2: Convert to fraction form
    39,400.90/59,101.35 = 18,664.90/x
  3. Step 3: Cross multiply
    39,400.90x = 59,101.35 × 18,664.90
  4. Step 4: Simplify right side
    39,400.90x = 1,103,120,787.62
  5. Step 5: Solve for x
    x = 1,103,120,787.62/39,400.90
  6. Step 6: Final answer
    x = 27,997.35

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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.