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Finding the Fourth Proportional to 14,661.59, 20,232.50 and 8,689.71

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Solution

The fourth proportional to 14,661.59, 20,232.50 and 8,689.71 is: 11,991.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,661.59 : 20,232.50 = 8,689.71 : x
  2. Step 2: Convert to fraction form
    14,661.59/20,232.50 = 8,689.71/x
  3. Step 3: Cross multiply
    14,661.59x = 20,232.50 × 8,689.71
  4. Step 4: Simplify right side
    14,661.59x = 175,814,514.13
  5. Step 5: Solve for x
    x = 175,814,514.13/14,661.59
  6. Step 6: Final answer
    x = 11,991.51

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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.