Home / 7,151.52-9,868.79-3,964.80

Finding the Fourth Proportional to 7,151.52, 9,868.79 and 3,964.80

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Solution

The fourth proportional to 7,151.52, 9,868.79 and 3,964.80 is: 5,471.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,151.52 : 9,868.79 = 3,964.80 : x
  2. Step 2: Convert to fraction form
    7,151.52/9,868.79 = 3,964.80/x
  3. Step 3: Cross multiply
    7,151.52x = 9,868.79 × 3,964.80
  4. Step 4: Simplify right side
    7,151.52x = 39,127,778.59
  5. Step 5: Solve for x
    x = 39,127,778.59/7,151.52
  6. Step 6: Final answer
    x = 5,471.25

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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.