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Finding the Fourth Proportional to 14,992.17, 20,689.86 and 8,620.83

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Solution

The fourth proportional to 14,992.17, 20,689.86 and 8,620.83 is: 11,897.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,992.17 : 20,689.86 = 8,620.83 : x
  2. Step 2: Convert to fraction form
    14,992.17/20,689.86 = 8,620.83/x
  3. Step 3: Cross multiply
    14,992.17x = 20,689.86 × 8,620.83
  4. Step 4: Simplify right side
    14,992.17x = 178,363,798.11
  5. Step 5: Solve for x
    x = 178,363,798.11/14,992.17
  6. Step 6: Final answer
    x = 11,897.13

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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.