Home / 8,391.10-11,581.39-6,398.09

Finding the Fourth Proportional to 8,391.10, 11,581.39 and 6,398.09

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Solution

The fourth proportional to 8,391.10, 11,581.39 and 6,398.09 is: 8,830.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,391.10 : 11,581.39 = 6,398.09 : x
  2. Step 2: Convert to fraction form
    8,391.10/11,581.39 = 6,398.09/x
  3. Step 3: Cross multiply
    8,391.10x = 11,581.39 × 6,398.09
  4. Step 4: Simplify right side
    8,391.10x = 74,098,812.50
  5. Step 5: Solve for x
    x = 74,098,812.50/8,391.10
  6. Step 6: Final answer
    x = 8,830.65

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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.