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Finding the Fourth Proportional to 6,972.80, 10,459.20 and 2,589.80

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Solution

The fourth proportional to 6,972.80, 10,459.20 and 2,589.80 is: 3,884.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,972.80 : 10,459.20 = 2,589.80 : x
  2. Step 2: Convert to fraction form
    6,972.80/10,459.20 = 2,589.80/x
  3. Step 3: Cross multiply
    6,972.80x = 10,459.20 × 2,589.80
  4. Step 4: Simplify right side
    6,972.80x = 27,087,236.16
  5. Step 5: Solve for x
    x = 27,087,236.16/6,972.80
  6. Step 6: Final answer
    x = 3,884.70

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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.