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Finding the Fourth Proportional to 18,619.74, 25,691.57 and 10,443.61

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Solution

The fourth proportional to 18,619.74, 25,691.57 and 10,443.61 is: 14,410.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,619.74 : 25,691.57 = 10,443.61 : x
  2. Step 2: Convert to fraction form
    18,619.74/25,691.57 = 10,443.61/x
  3. Step 3: Cross multiply
    18,619.74x = 25,691.57 × 10,443.61
  4. Step 4: Simplify right side
    18,619.74x = 268,312,686.01
  5. Step 5: Solve for x
    x = 268,312,686.01/18,619.74
  6. Step 6: Final answer
    x = 14,410.12

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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.