Home / 28,279.31-42,425.06-8,290.44

Finding the Fourth Proportional to 28,279.31, 42,425.06 and 8,290.44

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Solution

The fourth proportional to 28,279.31, 42,425.06 and 8,290.44 is: 12,437.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,279.31 : 42,425.06 = 8,290.44 : x
  2. Step 2: Convert to fraction form
    28,279.31/42,425.06 = 8,290.44/x
  3. Step 3: Cross multiply
    28,279.31x = 42,425.06 × 8,290.44
  4. Step 4: Simplify right side
    28,279.31x = 351,722,372.97
  5. Step 5: Solve for x
    x = 351,722,372.97/28,279.31
  6. Step 6: Final answer
    x = 12,437.45

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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.