Home / 22,131.76-30,531.12-13,176.40

Finding the Fourth Proportional to 22,131.76, 30,531.12 and 13,176.40

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Solution

The fourth proportional to 22,131.76, 30,531.12 and 13,176.40 is: 18,177.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,131.76 : 30,531.12 = 13,176.40 : x
  2. Step 2: Convert to fraction form
    22,131.76/30,531.12 = 13,176.40/x
  3. Step 3: Cross multiply
    22,131.76x = 30,531.12 × 13,176.40
  4. Step 4: Simplify right side
    22,131.76x = 402,290,249.57
  5. Step 5: Solve for x
    x = 402,290,249.57/22,131.76
  6. Step 6: Final answer
    x = 18,177.06

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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.