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Finding the Fourth Proportional to 28,234.76, 38,964.35 and 15,489.09

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Solution

The fourth proportional to 28,234.76, 38,964.35 and 15,489.09 is: 21,375.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,234.76 : 38,964.35 = 15,489.09 : x
  2. Step 2: Convert to fraction form
    28,234.76/38,964.35 = 15,489.09/x
  3. Step 3: Cross multiply
    28,234.76x = 38,964.35 × 15,489.09
  4. Step 4: Simplify right side
    28,234.76x = 603,522,362.66
  5. Step 5: Solve for x
    x = 603,522,362.66/28,234.76
  6. Step 6: Final answer
    x = 21,375.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.