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Finding the Fourth Proportional to 15,163.76, 20,925.71 and 8,449.24

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Solution

The fourth proportional to 15,163.76, 20,925.71 and 8,449.24 is: 11,659.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,163.76 : 20,925.71 = 8,449.24 : x
  2. Step 2: Convert to fraction form
    15,163.76/20,925.71 = 8,449.24/x
  3. Step 3: Cross multiply
    15,163.76x = 20,925.71 × 8,449.24
  4. Step 4: Simplify right side
    15,163.76x = 176,806,329.87
  5. Step 5: Solve for x
    x = 176,806,329.87/15,163.76
  6. Step 6: Final answer
    x = 11,659.80

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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.