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Finding the Fourth Proportional to 14,997.45, 20,689.61 and 8,708.61

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Solution

The fourth proportional to 14,997.45, 20,689.61 and 8,708.61 is: 12,013.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,997.45 : 20,689.61 = 8,708.61 : x
  2. Step 2: Convert to fraction form
    14,997.45/20,689.61 = 8,708.61/x
  3. Step 3: Cross multiply
    14,997.45x = 20,689.61 × 8,708.61
  4. Step 4: Simplify right side
    14,997.45x = 180,177,744.54
  5. Step 5: Solve for x
    x = 180,177,744.54/14,997.45
  6. Step 6: Final answer
    x = 12,013.89

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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.