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Finding the Fourth Proportional to 15,157.29, 20,917.02 and 8,442.85

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Solution

The fourth proportional to 15,157.29, 20,917.02 and 8,442.85 is: 11,651.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,157.29 : 20,917.02 = 8,442.85 : x
  2. Step 2: Convert to fraction form
    15,157.29/20,917.02 = 8,442.85/x
  3. Step 3: Cross multiply
    15,157.29x = 20,917.02 × 8,442.85
  4. Step 4: Simplify right side
    15,157.29x = 176,599,262.31
  5. Step 5: Solve for x
    x = 176,599,262.31/15,157.29
  6. Step 6: Final answer
    x = 11,651.11

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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.