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Finding the Fourth Proportional to 15,151.13, 20,910.18 and 8,868.77

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Solution

The fourth proportional to 15,151.13, 20,910.18 and 8,868.77 is: 12,239.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,151.13 : 20,910.18 = 8,868.77 : x
  2. Step 2: Convert to fraction form
    15,151.13/20,910.18 = 8,868.77/x
  3. Step 3: Cross multiply
    15,151.13x = 20,910.18 × 8,868.77
  4. Step 4: Simplify right side
    15,151.13x = 185,447,577.08
  5. Step 5: Solve for x
    x = 185,447,577.08/15,151.13
  6. Step 6: Final answer
    x = 12,239.85

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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.