Home / 10,957.20-15,120.94-5,921.42

Finding the Fourth Proportional to 10,957.20, 15,120.94 and 5,921.42

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Solution

The fourth proportional to 10,957.20, 15,120.94 and 5,921.42 is: 8,171.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,957.20 : 15,120.94 = 5,921.42 : x
  2. Step 2: Convert to fraction form
    10,957.20/15,120.94 = 5,921.42/x
  3. Step 3: Cross multiply
    10,957.20x = 15,120.94 × 5,921.42
  4. Step 4: Simplify right side
    10,957.20x = 89,537,464.49
  5. Step 5: Solve for x
    x = 89,537,464.49/10,957.20
  6. Step 6: Final answer
    x = 8,171.56

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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.