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Finding the Fourth Proportional to 20,937, 31,419.90 and 8,625

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Solution

The fourth proportional to 20,937, 31,419.90 and 8,625 is: 12,943.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,937 : 31,419.90 = 8,625 : x
  2. Step 2: Convert to fraction form
    20,937/31,419.90 = 8,625/x
  3. Step 3: Cross multiply
    20,937x = 31,419.90 × 8,625
  4. Step 4: Simplify right side
    20,937x = 270,996,637.50
  5. Step 5: Solve for x
    x = 270,996,637.50/20,937
  6. Step 6: Final answer
    x = 12,943.43

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.