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Finding the Fourth Proportional to 39,840.40, 59,764.92 and 14,892.40

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Solution

The fourth proportional to 39,840.40, 59,764.92 and 14,892.40 is: 22,340.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,840.40 : 59,764.92 = 14,892.40 : x
  2. Step 2: Convert to fraction form
    39,840.40/59,764.92 = 14,892.40/x
  3. Step 3: Cross multiply
    39,840.40x = 59,764.92 × 14,892.40
  4. Step 4: Simplify right side
    39,840.40x = 890,043,094.61
  5. Step 5: Solve for x
    x = 890,043,094.61/39,840.40
  6. Step 6: Final answer
    x = 22,340.21

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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.