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Finding the Fourth Proportional to 18,753.15, 28,143.56 and 8,892.47

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Solution

The fourth proportional to 18,753.15, 28,143.56 and 8,892.47 is: 13,345.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,753.15 : 28,143.56 = 8,892.47 : x
  2. Step 2: Convert to fraction form
    18,753.15/28,143.56 = 8,892.47/x
  3. Step 3: Cross multiply
    18,753.15x = 28,143.56 × 8,892.47
  4. Step 4: Simplify right side
    18,753.15x = 250,265,577.81
  5. Step 5: Solve for x
    x = 250,265,577.81/18,753.15
  6. Step 6: Final answer
    x = 13,345.26

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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.