Home / 28,179.64-42,276.48-8,458.56

Finding the Fourth Proportional to 28,179.64, 42,276.48 and 8,458.56

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Solution

The fourth proportional to 28,179.64, 42,276.48 and 8,458.56 is: 12,689.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,179.64 : 42,276.48 = 8,458.56 : x
  2. Step 2: Convert to fraction form
    28,179.64/42,276.48 = 8,458.56/x
  3. Step 3: Cross multiply
    28,179.64x = 42,276.48 × 8,458.56
  4. Step 4: Simplify right side
    28,179.64x = 357,598,142.67
  5. Step 5: Solve for x
    x = 357,598,142.67/28,179.64
  6. Step 6: Final answer
    x = 12,689.95

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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.