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Finding the Fourth Proportional to 28,064.22, 38,728.54 and 15,488.88

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Solution

The fourth proportional to 28,064.22, 38,728.54 and 15,488.88 is: 21,374.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,064.22 : 38,728.54 = 15,488.88 : x
  2. Step 2: Convert to fraction form
    28,064.22/38,728.54 = 15,488.88/x
  3. Step 3: Cross multiply
    28,064.22x = 38,728.54 × 15,488.88
  4. Step 4: Simplify right side
    28,064.22x = 599,861,708.64
  5. Step 5: Solve for x
    x = 599,861,708.64/28,064.22
  6. Step 6: Final answer
    x = 21,374.61

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