Home / 20,882.40-31,323.60-12,112.80

Finding the Fourth Proportional to 20,882.40, 31,323.60 and 12,112.80

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Solution

The fourth proportional to 20,882.40, 31,323.60 and 12,112.80 is: 18,169.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,882.40 : 31,323.60 = 12,112.80 : x
  2. Step 2: Convert to fraction form
    20,882.40/31,323.60 = 12,112.80/x
  3. Step 3: Cross multiply
    20,882.40x = 31,323.60 × 12,112.80
  4. Step 4: Simplify right side
    20,882.40x = 379,416,502.08
  5. Step 5: Solve for x
    x = 379,416,502.08/20,882.40
  6. Step 6: Final answer
    x = 18,169.20

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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.