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Finding the Fourth Proportional to 40,387.30, 60,590.70 and 12,685.30

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Solution

The fourth proportional to 40,387.30, 60,590.70 and 12,685.30 is: 19,031.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,387.30 : 60,590.70 = 12,685.30 : x
  2. Step 2: Convert to fraction form
    40,387.30/60,590.70 = 12,685.30/x
  3. Step 3: Cross multiply
    40,387.30x = 60,590.70 × 12,685.30
  4. Step 4: Simplify right side
    40,387.30x = 768,611,206.71
  5. Step 5: Solve for x
    x = 768,611,206.71/40,387.30
  6. Step 6: Final answer
    x = 19,031.01

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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.