Home / 10,972.20-15,143.80-8,314.96

Finding the Fourth Proportional to 10,972.20, 15,143.80 and 8,314.96

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Solution

The fourth proportional to 10,972.20, 15,143.80 and 8,314.96 is: 11,476.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,972.20 : 15,143.80 = 8,314.96 : x
  2. Step 2: Convert to fraction form
    10,972.20/15,143.80 = 8,314.96/x
  3. Step 3: Cross multiply
    10,972.20x = 15,143.80 × 8,314.96
  4. Step 4: Simplify right side
    10,972.20x = 125,920,091.25
  5. Step 5: Solve for x
    x = 125,920,091.25/10,972.20
  6. Step 6: Final answer
    x = 11,476.28

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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.