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Finding the Fourth Proportional to 27,128.88, 40,581 and 25,470

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Solution

The fourth proportional to 27,128.88, 40,581 and 25,470 is: 38,099.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,128.88 : 40,581 = 25,470 : x
  2. Step 2: Convert to fraction form
    27,128.88/40,581 = 25,470/x
  3. Step 3: Cross multiply
    27,128.88x = 40,581 × 25,470
  4. Step 4: Simplify right side
    27,128.88x = 1,033,598,070
  5. Step 5: Solve for x
    x = 1,033,598,070/27,128.88
  6. Step 6: Final answer
    x = 38,099.55

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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.