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Finding the Fourth Proportional to 6,515.90, 8,991.95 and 3,531.72

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Solution

The fourth proportional to 6,515.90, 8,991.95 and 3,531.72 is: 4,873.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,515.90 : 8,991.95 = 3,531.72 : x
  2. Step 2: Convert to fraction form
    6,515.90/8,991.95 = 3,531.72/x
  3. Step 3: Cross multiply
    6,515.90x = 8,991.95 × 3,531.72
  4. Step 4: Simplify right side
    6,515.90x = 31,757,036.41
  5. Step 5: Solve for x
    x = 31,757,036.41/6,515.90
  6. Step 6: Final answer
    x = 4,873.78

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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.