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Finding the Fourth Proportional to 18,699.92, 25,753.38 and 18,291.68

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Solution

The fourth proportional to 18,699.92, 25,753.38 and 18,291.68 is: 25,191.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,699.92 : 25,753.38 = 18,291.68 : x
  2. Step 2: Convert to fraction form
    18,699.92/25,753.38 = 18,291.68/x
  3. Step 3: Cross multiply
    18,699.92x = 25,753.38 × 18,291.68
  4. Step 4: Simplify right side
    18,699.92x = 471,072,585.88
  5. Step 5: Solve for x
    x = 471,072,585.88/18,699.92
  6. Step 6: Final answer
    x = 25,191.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.