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Finding the Fourth Proportional to 15,911.87, 23,867.87 and 5,381.97

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Solution

The fourth proportional to 15,911.87, 23,867.87 and 5,381.97 is: 8,072.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,911.87 : 23,867.87 = 5,381.97 : x
  2. Step 2: Convert to fraction form
    15,911.87/23,867.87 = 5,381.97/x
  3. Step 3: Cross multiply
    15,911.87x = 23,867.87 × 5,381.97
  4. Step 4: Simplify right side
    15,911.87x = 128,456,111.02
  5. Step 5: Solve for x
    x = 128,456,111.02/15,911.87
  6. Step 6: Final answer
    x = 8,072.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.