Home / 8,278.90-11,417.11-6,387.48

Finding the Fourth Proportional to 8,278.90, 11,417.11 and 6,387.48

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Solution

The fourth proportional to 8,278.90, 11,417.11 and 6,387.48 is: 8,808.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,278.90 : 11,417.11 = 6,387.48 : x
  2. Step 2: Convert to fraction form
    8,278.90/11,417.11 = 6,387.48/x
  3. Step 3: Cross multiply
    8,278.90x = 11,417.11 × 6,387.48
  4. Step 4: Simplify right side
    8,278.90x = 72,926,545.81
  5. Step 5: Solve for x
    x = 72,926,545.81/8,278.90
  6. Step 6: Final answer
    x = 8,808.73

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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.