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Finding the Fourth Proportional to 6,512.78, 8,987.71 and 3,859.68

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Solution

The fourth proportional to 6,512.78, 8,987.71 and 3,859.68 is: 5,326.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,512.78 : 8,987.71 = 3,859.68 : x
  2. Step 2: Convert to fraction form
    6,512.78/8,987.71 = 3,859.68/x
  3. Step 3: Cross multiply
    6,512.78x = 8,987.71 × 3,859.68
  4. Step 4: Simplify right side
    6,512.78x = 34,689,684.53
  5. Step 5: Solve for x
    x = 34,689,684.53/6,512.78
  6. Step 6: Final answer
    x = 5,326.41

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1.5x scale

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.