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Finding the Fourth Proportional to 28,641.66, 42,960.78 and 17,028.78

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Solution

The fourth proportional to 28,641.66, 42,960.78 and 17,028.78 is: 25,542.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,641.66 : 42,960.78 = 17,028.78 : x
  2. Step 2: Convert to fraction form
    28,641.66/42,960.78 = 17,028.78/x
  3. Step 3: Cross multiply
    28,641.66x = 42,960.78 × 17,028.78
  4. Step 4: Simplify right side
    28,641.66x = 731,569,671.25
  5. Step 5: Solve for x
    x = 731,569,671.25/28,641.66
  6. Step 6: Final answer
    x = 25,542.15

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1.5x scale

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.