Home / 10,278.72-15,387.36-7,675.20

Finding the Fourth Proportional to 10,278.72, 15,387.36 and 7,675.20

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Solution

The fourth proportional to 10,278.72, 15,387.36 and 7,675.20 is: 11,489.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,278.72 : 15,387.36 = 7,675.20 : x
  2. Step 2: Convert to fraction form
    10,278.72/15,387.36 = 7,675.20/x
  3. Step 3: Cross multiply
    10,278.72x = 15,387.36 × 7,675.20
  4. Step 4: Simplify right side
    10,278.72x = 118,101,065.47
  5. Step 5: Solve for x
    x = 118,101,065.47/10,278.72
  6. Step 6: Final answer
    x = 11,489.86

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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.