Home / 21,253.20-29,330.15-12,180.12

Finding the Fourth Proportional to 21,253.20, 29,330.15 and 12,180.12

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Solution

The fourth proportional to 21,253.20, 29,330.15 and 12,180.12 is: 16,808.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,253.20 : 29,330.15 = 12,180.12 : x
  2. Step 2: Convert to fraction form
    21,253.20/29,330.15 = 12,180.12/x
  3. Step 3: Cross multiply
    21,253.20x = 29,330.15 × 12,180.12
  4. Step 4: Simplify right side
    21,253.20x = 357,244,685.72
  5. Step 5: Solve for x
    x = 357,244,685.72/21,253.20
  6. Step 6: Final answer
    x = 16,808.98

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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.