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Finding the Fourth Proportional to 15,146.31, 20,904.98 and 8,860.71

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Solution

The fourth proportional to 15,146.31, 20,904.98 and 8,860.71 is: 12,229.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,146.31 : 20,904.98 = 8,860.71 : x
  2. Step 2: Convert to fraction form
    15,146.31/20,904.98 = 8,860.71/x
  3. Step 3: Cross multiply
    15,146.31x = 20,904.98 × 8,860.71
  4. Step 4: Simplify right side
    15,146.31x = 185,232,921.03
  5. Step 5: Solve for x
    x = 185,232,921.03/15,146.31
  6. Step 6: Final answer
    x = 12,229.57

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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.