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Finding the Fourth Proportional to 28,875, 39,847.52 and 15,627

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Solution

The fourth proportional to 28,875, 39,847.52 and 15,627 is: 21,565.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,875 : 39,847.52 = 15,627 : x
  2. Step 2: Convert to fraction form
    28,875/39,847.52 = 15,627/x
  3. Step 3: Cross multiply
    28,875x = 39,847.52 × 15,627
  4. Step 4: Simplify right side
    28,875x = 622,697,195.04
  5. Step 5: Solve for x
    x = 622,697,195.04/28,875
  6. Step 6: Final answer
    x = 21,565.27

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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.