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Finding the Fourth Proportional to 6,391.85, 8,817.37 and 4,398.95

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Solution

The fourth proportional to 6,391.85, 8,817.37 and 4,398.95 is: 6,068.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,391.85 : 8,817.37 = 4,398.95 : x
  2. Step 2: Convert to fraction form
    6,391.85/8,817.37 = 4,398.95/x
  3. Step 3: Cross multiply
    6,391.85x = 8,817.37 × 4,398.95
  4. Step 4: Simplify right side
    6,391.85x = 38,787,125.00
  5. Step 5: Solve for x
    x = 38,787,125.00/6,391.85
  6. Step 6: Final answer
    x = 6,068.22

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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.