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Finding the Fourth Proportional to 6,513.60, 8,988.12 and 3,719.04

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Solution

The fourth proportional to 6,513.60, 8,988.12 and 3,719.04 is: 5,131.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,513.60 : 8,988.12 = 3,719.04 : x
  2. Step 2: Convert to fraction form
    6,513.60/8,988.12 = 3,719.04/x
  3. Step 3: Cross multiply
    6,513.60x = 8,988.12 × 3,719.04
  4. Step 4: Simplify right side
    6,513.60x = 33,427,177.80
  5. Step 5: Solve for x
    x = 33,427,177.80/6,513.60
  6. Step 6: Final answer
    x = 5,131.91

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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.