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Finding the Fourth Proportional to 7,939.60, 11,909.51 and 5,473.76

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Solution

The fourth proportional to 7,939.60, 11,909.51 and 5,473.76 is: 8,210.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,939.60 : 11,909.51 = 5,473.76 : x
  2. Step 2: Convert to fraction form
    7,939.60/11,909.51 = 5,473.76/x
  3. Step 3: Cross multiply
    7,939.60x = 11,909.51 × 5,473.76
  4. Step 4: Simplify right side
    7,939.60x = 65,189,830.85
  5. Step 5: Solve for x
    x = 65,189,830.85/7,939.60
  6. Step 6: Final answer
    x = 8,210.72

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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.