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Finding the Fourth Proportional to 7,990.92, 11,017.50 and 6,218.76

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Solution

The fourth proportional to 7,990.92, 11,017.50 and 6,218.76 is: 8,574.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,990.92 : 11,017.50 = 6,218.76 : x
  2. Step 2: Convert to fraction form
    7,990.92/11,017.50 = 6,218.76/x
  3. Step 3: Cross multiply
    7,990.92x = 11,017.50 × 6,218.76
  4. Step 4: Simplify right side
    7,990.92x = 68,515,188.30
  5. Step 5: Solve for x
    x = 68,515,188.30/7,990.92
  6. Step 6: Final answer
    x = 8,574.13

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Half scale
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Double scale
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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.