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Finding the Fourth Proportional to 7,990.40, 11,028 and 6,098.40

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Solution

The fourth proportional to 7,990.40, 11,028 and 6,098.40 is: 8,416.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,990.40 : 11,028 = 6,098.40 : x
  2. Step 2: Convert to fraction form
    7,990.40/11,028 = 6,098.40/x
  3. Step 3: Cross multiply
    7,990.40x = 11,028 × 6,098.40
  4. Step 4: Simplify right side
    7,990.40x = 67,253,155.20
  5. Step 5: Solve for x
    x = 67,253,155.20/7,990.40
  6. Step 6: Final answer
    x = 8,416.74

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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.