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Finding the Fourth Proportional to 18,631.69, 25,712.13 and 10,248.19

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Solution

The fourth proportional to 18,631.69, 25,712.13 and 10,248.19 is: 14,142.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,631.69 : 25,712.13 = 10,248.19 : x
  2. Step 2: Convert to fraction form
    18,631.69/25,712.13 = 10,248.19/x
  3. Step 3: Cross multiply
    18,631.69x = 25,712.13 × 10,248.19
  4. Step 4: Simplify right side
    18,631.69x = 263,502,767.70
  5. Step 5: Solve for x
    x = 263,502,767.70/18,631.69
  6. Step 6: Final answer
    x = 14,142.72

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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.