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Finding the Fourth Proportional to 6,638.95, 9,964.10 and 3,521.13

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Solution

The fourth proportional to 6,638.95, 9,964.10 and 3,521.13 is: 5,284.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,638.95 : 9,964.10 = 3,521.13 : x
  2. Step 2: Convert to fraction form
    6,638.95/9,964.10 = 3,521.13/x
  3. Step 3: Cross multiply
    6,638.95x = 9,964.10 × 3,521.13
  4. Step 4: Simplify right side
    6,638.95x = 35,084,891.43
  5. Step 5: Solve for x
    x = 35,084,891.43/6,638.95
  6. Step 6: Final answer
    x = 5,284.70

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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.