Home / 20,143.12-30,180.56-12,335.62

Finding the Fourth Proportional to 20,143.12, 30,180.56 and 12,335.62

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Solution

The fourth proportional to 20,143.12, 30,180.56 and 12,335.62 is: 18,482.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,143.12 : 30,180.56 = 12,335.62 : x
  2. Step 2: Convert to fraction form
    20,143.12/30,180.56 = 12,335.62/x
  3. Step 3: Cross multiply
    20,143.12x = 30,180.56 × 12,335.62
  4. Step 4: Simplify right side
    20,143.12x = 372,295,919.55
  5. Step 5: Solve for x
    x = 372,295,919.55/20,143.12
  6. Step 6: Final answer
    x = 18,482.53

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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.