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Finding the Fourth Proportional to 40,356.90, 60,545.08 and 12,654.90

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Solution

The fourth proportional to 40,356.90, 60,545.08 and 12,654.90 is: 18,985.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,356.90 : 60,545.08 = 12,654.90 : x
  2. Step 2: Convert to fraction form
    40,356.90/60,545.08 = 12,654.90/x
  3. Step 3: Cross multiply
    40,356.90x = 60,545.08 × 12,654.90
  4. Step 4: Simplify right side
    40,356.90x = 766,191,932.89
  5. Step 5: Solve for x
    x = 766,191,932.89/40,356.90
  6. Step 6: Final answer
    x = 18,985.40

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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.