Home / 11,511.78-15,882.66-6,475.20

Finding the Fourth Proportional to 11,511.78, 15,882.66 and 6,475.20

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Solution

The fourth proportional to 11,511.78, 15,882.66 and 6,475.20 is: 8,933.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,511.78 : 15,882.66 = 6,475.20 : x
  2. Step 2: Convert to fraction form
    11,511.78/15,882.66 = 6,475.20/x
  3. Step 3: Cross multiply
    11,511.78x = 15,882.66 × 6,475.20
  4. Step 4: Simplify right side
    11,511.78x = 102,843,400.03
  5. Step 5: Solve for x
    x = 102,843,400.03/11,511.78
  6. Step 6: Final answer
    x = 8,933.75

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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.