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Finding the Fourth Proportional to 6,391.13, 8,818.97 and 3,557.75

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Solution

The fourth proportional to 6,391.13, 8,818.97 and 3,557.75 is: 4,909.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,391.13 : 8,818.97 = 3,557.75 : x
  2. Step 2: Convert to fraction form
    6,391.13/8,818.97 = 3,557.75/x
  3. Step 3: Cross multiply
    6,391.13x = 8,818.97 × 3,557.75
  4. Step 4: Simplify right side
    6,391.13x = 31,375,628.63
  5. Step 5: Solve for x
    x = 31,375,628.63/6,391.13
  6. Step 6: Final answer
    x = 4,909.25

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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.