Home / 13,122.22-18,108.20-7,153.76

Finding the Fourth Proportional to 13,122.22, 18,108.20 and 7,153.76

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Solution

The fourth proportional to 13,122.22, 18,108.20 and 7,153.76 is: 9,871.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,122.22 : 18,108.20 = 7,153.76 : x
  2. Step 2: Convert to fraction form
    13,122.22/18,108.20 = 7,153.76/x
  3. Step 3: Cross multiply
    13,122.22x = 18,108.20 × 7,153.76
  4. Step 4: Simplify right side
    13,122.22x = 129,541,716.83
  5. Step 5: Solve for x
    x = 129,541,716.83/13,122.22
  6. Step 6: Final answer
    x = 9,871.94

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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.