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Finding the Fourth Proportional to 6,480.88, 9,721.36 and 2,585.28

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Solution

The fourth proportional to 6,480.88, 9,721.36 and 2,585.28 is: 3,877.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,480.88 : 9,721.36 = 2,585.28 : x
  2. Step 2: Convert to fraction form
    6,480.88/9,721.36 = 2,585.28/x
  3. Step 3: Cross multiply
    6,480.88x = 9,721.36 × 2,585.28
  4. Step 4: Simplify right side
    6,480.88x = 25,132,437.58
  5. Step 5: Solve for x
    x = 25,132,437.58/6,480.88
  6. Step 6: Final answer
    x = 3,877.94

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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.