Home / 28,175.20-42,257.40-8,454.40

Finding the Fourth Proportional to 28,175.20, 42,257.40 and 8,454.40

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Solution

The fourth proportional to 28,175.20, 42,257.40 and 8,454.40 is: 12,679.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,175.20 : 42,257.40 = 8,454.40 : x
  2. Step 2: Convert to fraction form
    28,175.20/42,257.40 = 8,454.40/x
  3. Step 3: Cross multiply
    28,175.20x = 42,257.40 × 8,454.40
  4. Step 4: Simplify right side
    28,175.20x = 357,260,962.56
  5. Step 5: Solve for x
    x = 357,260,962.56/28,175.20
  6. Step 6: Final answer
    x = 12,679.98

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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.