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Finding the Fourth Proportional to 7,188.90, 9,919.98 and 4,045.02

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Solution

The fourth proportional to 7,188.90, 9,919.98 and 4,045.02 is: 5,581.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,188.90 : 9,919.98 = 4,045.02 : x
  2. Step 2: Convert to fraction form
    7,188.90/9,919.98 = 4,045.02/x
  3. Step 3: Cross multiply
    7,188.90x = 9,919.98 × 4,045.02
  4. Step 4: Simplify right side
    7,188.90x = 40,126,517.50
  5. Step 5: Solve for x
    x = 40,126,517.50/7,188.90
  6. Step 6: Final answer
    x = 5,581.73

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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.