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Finding the Fourth Proportional to 28,716.16, 42,982.02 and 15,355.71

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Solution

The fourth proportional to 28,716.16, 42,982.02 and 15,355.71 is: 22,984.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,716.16 : 42,982.02 = 15,355.71 : x
  2. Step 2: Convert to fraction form
    28,716.16/42,982.02 = 15,355.71/x
  3. Step 3: Cross multiply
    28,716.16x = 42,982.02 × 15,355.71
  4. Step 4: Simplify right side
    28,716.16x = 660,019,434.33
  5. Step 5: Solve for x
    x = 660,019,434.33/28,716.16
  6. Step 6: Final answer
    x = 22,984.25

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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.