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Finding the Fourth Proportional to 18,126.93, 25,035.42 and 12,479

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Solution

The fourth proportional to 18,126.93, 25,035.42 and 12,479 is: 17,234.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,126.93 : 25,035.42 = 12,479 : x
  2. Step 2: Convert to fraction form
    18,126.93/25,035.42 = 12,479/x
  3. Step 3: Cross multiply
    18,126.93x = 25,035.42 × 12,479
  4. Step 4: Simplify right side
    18,126.93x = 312,417,006.18
  5. Step 5: Solve for x
    x = 312,417,006.18/18,126.93
  6. Step 6: Final answer
    x = 17,234.97

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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.