Home / 10,118.20-15,180.28-5,191.32

Finding the Fourth Proportional to 10,118.20, 15,180.28 and 5,191.32

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Solution

The fourth proportional to 10,118.20, 15,180.28 and 5,191.32 is: 7,788.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,118.20 : 15,180.28 = 5,191.32 : x
  2. Step 2: Convert to fraction form
    10,118.20/15,180.28 = 5,191.32/x
  3. Step 3: Cross multiply
    10,118.20x = 15,180.28 × 5,191.32
  4. Step 4: Simplify right side
    10,118.20x = 78,805,691.17
  5. Step 5: Solve for x
    x = 78,805,691.17/10,118.20
  6. Step 6: Final answer
    x = 7,788.51

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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.