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Finding the Fourth Proportional to 7,757.40, 11,636.10 and 3,140.40

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Solution

The fourth proportional to 7,757.40, 11,636.10 and 3,140.40 is: 4,710.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,757.40 : 11,636.10 = 3,140.40 : x
  2. Step 2: Convert to fraction form
    7,757.40/11,636.10 = 3,140.40/x
  3. Step 3: Cross multiply
    7,757.40x = 11,636.10 × 3,140.40
  4. Step 4: Simplify right side
    7,757.40x = 36,542,008.44
  5. Step 5: Solve for x
    x = 36,542,008.44/7,757.40
  6. Step 6: Final answer
    x = 4,710.60

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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.