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Finding the Fourth Proportional to 15,187.70, 20,959.34 and 8,473.61

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Solution

The fourth proportional to 15,187.70, 20,959.34 and 8,473.61 is: 11,693.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,187.70 : 20,959.34 = 8,473.61 : x
  2. Step 2: Convert to fraction form
    15,187.70/20,959.34 = 8,473.61/x
  3. Step 3: Cross multiply
    15,187.70x = 20,959.34 × 8,473.61
  4. Step 4: Simplify right side
    15,187.70x = 177,601,273.02
  5. Step 5: Solve for x
    x = 177,601,273.02/15,187.70
  6. Step 6: Final answer
    x = 11,693.76

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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.