Home / 8,690.13-11,982.87-6,456.15

Finding the Fourth Proportional to 8,690.13, 11,982.87 and 6,456.15

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Solution

The fourth proportional to 8,690.13, 11,982.87 and 6,456.15 is: 8,902.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,690.13 : 11,982.87 = 6,456.15 : x
  2. Step 2: Convert to fraction form
    8,690.13/11,982.87 = 6,456.15/x
  3. Step 3: Cross multiply
    8,690.13x = 11,982.87 × 6,456.15
  4. Step 4: Simplify right side
    8,690.13x = 77,363,206.15
  5. Step 5: Solve for x
    x = 77,363,206.15/8,690.13
  6. Step 6: Final answer
    x = 8,902.42

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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.