Home / 28,186.20-42,279.30-7,126.20

Finding the Fourth Proportional to 28,186.20, 42,279.30 and 7,126.20

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Solution

The fourth proportional to 28,186.20, 42,279.30 and 7,126.20 is: 10,689.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,186.20 : 42,279.30 = 7,126.20 : x
  2. Step 2: Convert to fraction form
    28,186.20/42,279.30 = 7,126.20/x
  3. Step 3: Cross multiply
    28,186.20x = 42,279.30 × 7,126.20
  4. Step 4: Simplify right side
    28,186.20x = 301,290,747.66
  5. Step 5: Solve for x
    x = 301,290,747.66/28,186.20
  6. Step 6: Final answer
    x = 10,689.30

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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.