Home / 21,520.38-32,222.52-12,146.40

Finding the Fourth Proportional to 21,520.38, 32,222.52 and 12,146.40

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Solution

The fourth proportional to 21,520.38, 32,222.52 and 12,146.40 is: 18,186.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,520.38 : 32,222.52 = 12,146.40 : x
  2. Step 2: Convert to fraction form
    21,520.38/32,222.52 = 12,146.40/x
  3. Step 3: Cross multiply
    21,520.38x = 32,222.52 × 12,146.40
  4. Step 4: Simplify right side
    21,520.38x = 391,387,616.93
  5. Step 5: Solve for x
    x = 391,387,616.93/21,520.38
  6. Step 6: Final answer
    x = 18,186.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.