Home / 28,279.72-42,420.19-8,558.25

Finding the Fourth Proportional to 28,279.72, 42,420.19 and 8,558.25

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Solution

The fourth proportional to 28,279.72, 42,420.19 and 8,558.25 is: 12,837.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,279.72 : 42,420.19 = 8,558.25 : x
  2. Step 2: Convert to fraction form
    28,279.72/42,420.19 = 8,558.25/x
  3. Step 3: Cross multiply
    28,279.72x = 42,420.19 × 8,558.25
  4. Step 4: Simplify right side
    28,279.72x = 363,042,378.97
  5. Step 5: Solve for x
    x = 363,042,378.97/28,279.72
  6. Step 6: Final answer
    x = 12,837.55

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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.