Home / 20,115.42-30,182.84-8,277.92

Finding the Fourth Proportional to 20,115.42, 30,182.84 and 8,277.92

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Solution

The fourth proportional to 20,115.42, 30,182.84 and 8,277.92 is: 12,420.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,115.42 : 30,182.84 = 8,277.92 : x
  2. Step 2: Convert to fraction form
    20,115.42/30,182.84 = 8,277.92/x
  3. Step 3: Cross multiply
    20,115.42x = 30,182.84 × 8,277.92
  4. Step 4: Simplify right side
    20,115.42x = 249,851,086.82
  5. Step 5: Solve for x
    x = 249,851,086.82/20,115.42
  6. Step 6: Final answer
    x = 12,420.88

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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.