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Finding the Fourth Proportional to 6,140.90, 8,616.70 and 6,140.90

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Solution

The fourth proportional to 6,140.90, 8,616.70 and 6,140.90 is: 8,616.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,140.90 : 8,616.70 = 6,140.90 : x
  2. Step 2: Convert to fraction form
    6,140.90/8,616.70 = 6,140.90/x
  3. Step 3: Cross multiply
    6,140.90x = 8,616.70 × 6,140.90
  4. Step 4: Simplify right side
    6,140.90x = 52,914,293.03
  5. Step 5: Solve for x
    x = 52,914,293.03/6,140.90
  6. Step 6: Final answer
    x = 8,616.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.