Home / 13,122.12-18,108.41-7,153.68

Finding the Fourth Proportional to 13,122.12, 18,108.41 and 7,153.68

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Solution

The fourth proportional to 13,122.12, 18,108.41 and 7,153.68 is: 9,872.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,122.12 : 18,108.41 = 7,153.68 : x
  2. Step 2: Convert to fraction form
    13,122.12/18,108.41 = 7,153.68/x
  3. Step 3: Cross multiply
    13,122.12x = 18,108.41 × 7,153.68
  4. Step 4: Simplify right side
    13,122.12x = 129,541,697.79
  5. Step 5: Solve for x
    x = 129,541,697.79/13,122.12
  6. Step 6: Final answer
    x = 9,872.01

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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.