Home / 8,391.29-11,569.50-6,398.69

Finding the Fourth Proportional to 8,391.29, 11,569.50 and 6,398.69

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Solution

The fourth proportional to 8,391.29, 11,569.50 and 6,398.69 is: 8,822.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,391.29 : 11,569.50 = 6,398.69 : x
  2. Step 2: Convert to fraction form
    8,391.29/11,569.50 = 6,398.69/x
  3. Step 3: Cross multiply
    8,391.29x = 11,569.50 × 6,398.69
  4. Step 4: Simplify right side
    8,391.29x = 74,029,586.11
  5. Step 5: Solve for x
    x = 74,029,586.11/8,391.29
  6. Step 6: Final answer
    x = 8,822.20

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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.