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Finding the Fourth Proportional to 6,662.52, 9,988.20 and 4,191.21

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Solution

The fourth proportional to 6,662.52, 9,988.20 and 4,191.21 is: 6,283.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,662.52 : 9,988.20 = 4,191.21 : x
  2. Step 2: Convert to fraction form
    6,662.52/9,988.20 = 4,191.21/x
  3. Step 3: Cross multiply
    6,662.52x = 9,988.20 × 4,191.21
  4. Step 4: Simplify right side
    6,662.52x = 41,862,643.72
  5. Step 5: Solve for x
    x = 41,862,643.72/6,662.52
  6. Step 6: Final answer
    x = 6,283.30

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1.5x scale

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.