Home / 13,122.28-18,108.20-7,153.82

Finding the Fourth Proportional to 13,122.28, 18,108.20 and 7,153.82

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Solution

The fourth proportional to 13,122.28, 18,108.20 and 7,153.82 is: 9,871.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,122.28 : 18,108.20 = 7,153.82 : x
  2. Step 2: Convert to fraction form
    13,122.28/18,108.20 = 7,153.82/x
  3. Step 3: Cross multiply
    13,122.28x = 18,108.20 × 7,153.82
  4. Step 4: Simplify right side
    13,122.28x = 129,542,803.32
  5. Step 5: Solve for x
    x = 129,542,803.32/13,122.28
  6. Step 6: Final answer
    x = 9,871.97

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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.