Home / 28,721.20-43,081.72-8,999.84

Finding the Fourth Proportional to 28,721.20, 43,081.72 and 8,999.84

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Solution

The fourth proportional to 28,721.20, 43,081.72 and 8,999.84 is: 13,499.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,721.20 : 43,081.72 = 8,999.84 : x
  2. Step 2: Convert to fraction form
    28,721.20/43,081.72 = 8,999.84/x
  3. Step 3: Cross multiply
    28,721.20x = 43,081.72 × 8,999.84
  4. Step 4: Simplify right side
    28,721.20x = 387,728,586.92
  5. Step 5: Solve for x
    x = 387,728,586.92/28,721.20
  6. Step 6: Final answer
    x = 13,499.73

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Half scale
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Double scale
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Similar ratio
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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.