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Finding the Fourth Proportional to 15,117.78, 20,863.24 and 8,403.52

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Solution

The fourth proportional to 15,117.78, 20,863.24 and 8,403.52 is: 11,597.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,117.78 : 20,863.24 = 8,403.52 : x
  2. Step 2: Convert to fraction form
    15,117.78/20,863.24 = 8,403.52/x
  3. Step 3: Cross multiply
    15,117.78x = 20,863.24 × 8,403.52
  4. Step 4: Simplify right side
    15,117.78x = 175,324,654.60
  5. Step 5: Solve for x
    x = 175,324,654.60/15,117.78
  6. Step 6: Final answer
    x = 11,597.25

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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.