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Finding the Fourth Proportional to 7,151.76, 9,869.48 and 4,007.84

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Solution

The fourth proportional to 7,151.76, 9,869.48 and 4,007.84 is: 5,530.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,151.76 : 9,869.48 = 4,007.84 : x
  2. Step 2: Convert to fraction form
    7,151.76/9,869.48 = 4,007.84/x
  3. Step 3: Cross multiply
    7,151.76x = 9,869.48 × 4,007.84
  4. Step 4: Simplify right side
    7,151.76x = 39,555,296.72
  5. Step 5: Solve for x
    x = 39,555,296.72/7,151.76
  6. Step 6: Final answer
    x = 5,530.85

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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.