Home / 20,139.60-30,151.80-12,363.60

Finding the Fourth Proportional to 20,139.60, 30,151.80 and 12,363.60

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Solution

The fourth proportional to 20,139.60, 30,151.80 and 12,363.60 is: 18,510.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,139.60 : 30,151.80 = 12,363.60 : x
  2. Step 2: Convert to fraction form
    20,139.60/30,151.80 = 12,363.60/x
  3. Step 3: Cross multiply
    20,139.60x = 30,151.80 × 12,363.60
  4. Step 4: Simplify right side
    20,139.60x = 372,784,794.48
  5. Step 5: Solve for x
    x = 372,784,794.48/20,139.60
  6. Step 6: Final answer
    x = 18,510.04

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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.