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Finding the Fourth Proportional to 40,347, 60,530.22 and 12,645

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Solution

The fourth proportional to 40,347, 60,530.22 and 12,645 is: 18,970.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,347 : 60,530.22 = 12,645 : x
  2. Step 2: Convert to fraction form
    40,347/60,530.22 = 12,645/x
  3. Step 3: Cross multiply
    40,347x = 60,530.22 × 12,645
  4. Step 4: Simplify right side
    40,347x = 765,404,631.90
  5. Step 5: Solve for x
    x = 765,404,631.90/40,347
  6. Step 6: Final answer
    x = 18,970.55

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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.