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Finding the Fourth Proportional to 40,385.25, 60,581.12 and 12,683.25

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Solution

The fourth proportional to 40,385.25, 60,581.12 and 12,683.25 is: 19,025.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,385.25 : 60,581.12 = 12,683.25 : x
  2. Step 2: Convert to fraction form
    40,385.25/60,581.12 = 12,683.25/x
  3. Step 3: Cross multiply
    40,385.25x = 60,581.12 × 12,683.25
  4. Step 4: Simplify right side
    40,385.25x = 768,365,426.82
  5. Step 5: Solve for x
    x = 768,365,426.82/40,385.25
  6. Step 6: Final answer
    x = 19,025.89

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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.