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Finding the Fourth Proportional to 6,397.80, 9,596.70 and 3,287.40

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Solution

The fourth proportional to 6,397.80, 9,596.70 and 3,287.40 is: 4,931.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,397.80 : 9,596.70 = 3,287.40 : x
  2. Step 2: Convert to fraction form
    6,397.80/9,596.70 = 3,287.40/x
  3. Step 3: Cross multiply
    6,397.80x = 9,596.70 × 3,287.40
  4. Step 4: Simplify right side
    6,397.80x = 31,548,191.58
  5. Step 5: Solve for x
    x = 31,548,191.58/6,397.80
  6. Step 6: Final answer
    x = 4,931.10

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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.