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Finding the Fourth Proportional to 18,065.92, 24,936.74 and 12,689.65

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Solution

The fourth proportional to 18,065.92, 24,936.74 and 12,689.65 is: 17,515.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,065.92 : 24,936.74 = 12,689.65 : x
  2. Step 2: Convert to fraction form
    18,065.92/24,936.74 = 12,689.65/x
  3. Step 3: Cross multiply
    18,065.92x = 24,936.74 × 12,689.65
  4. Step 4: Simplify right side
    18,065.92x = 316,438,502.74
  5. Step 5: Solve for x
    x = 316,438,502.74/18,065.92
  6. Step 6: Final answer
    x = 17,515.77

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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.