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Finding the Fourth Proportional to 28,494.72, 39,319.20 and 15,919.20

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Solution

The fourth proportional to 28,494.72, 39,319.20 and 15,919.20 is: 21,966.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,494.72 : 39,319.20 = 15,919.20 : x
  2. Step 2: Convert to fraction form
    28,494.72/39,319.20 = 15,919.20/x
  3. Step 3: Cross multiply
    28,494.72x = 39,319.20 × 15,919.20
  4. Step 4: Simplify right side
    28,494.72x = 625,930,208.64
  5. Step 5: Solve for x
    x = 625,930,208.64/28,494.72
  6. Step 6: Final answer
    x = 21,966.53

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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.