Home / 7,121.30-9,827.43-5,132.48

Finding the Fourth Proportional to 7,121.30, 9,827.43 and 5,132.48

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Solution

The fourth proportional to 7,121.30, 9,827.43 and 5,132.48 is: 7,082.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,121.30 : 9,827.43 = 5,132.48 : x
  2. Step 2: Convert to fraction form
    7,121.30/9,827.43 = 5,132.48/x
  3. Step 3: Cross multiply
    7,121.30x = 9,827.43 × 5,132.48
  4. Step 4: Simplify right side
    7,121.30x = 50,439,087.93
  5. Step 5: Solve for x
    x = 50,439,087.93/7,121.30
  6. Step 6: Final answer
    x = 7,082.85

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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.