Home / 15,204.11-20,981.68-8,489.72

Finding the Fourth Proportional to 15,204.11, 20,981.68 and 8,489.72

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Solution

The fourth proportional to 15,204.11, 20,981.68 and 8,489.72 is: 11,715.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,204.11 : 20,981.68 = 8,489.72 : x
  2. Step 2: Convert to fraction form
    15,204.11/20,981.68 = 8,489.72/x
  3. Step 3: Cross multiply
    15,204.11x = 20,981.68 × 8,489.72
  4. Step 4: Simplify right side
    15,204.11x = 178,128,619.56
  5. Step 5: Solve for x
    x = 178,128,619.56/15,204.11
  6. Step 6: Final answer
    x = 11,715.82

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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.