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Finding the Fourth Proportional to 6,331.87, 9,488.91 and 3,990.77

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Solution

The fourth proportional to 6,331.87, 9,488.91 and 3,990.77 is: 5,980.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,331.87 : 9,488.91 = 3,990.77 : x
  2. Step 2: Convert to fraction form
    6,331.87/9,488.91 = 3,990.77/x
  3. Step 3: Cross multiply
    6,331.87x = 9,488.91 × 3,990.77
  4. Step 4: Simplify right side
    6,331.87x = 37,868,060.46
  5. Step 5: Solve for x
    x = 37,868,060.46/6,331.87
  6. Step 6: Final answer
    x = 5,980.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.