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Finding the Fourth Proportional to 6,822.40, 10,214.40 and 6,131.20

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Solution

The fourth proportional to 6,822.40, 10,214.40 and 6,131.20 is: 9,179.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,822.40 : 10,214.40 = 6,131.20 : x
  2. Step 2: Convert to fraction form
    6,822.40/10,214.40 = 6,131.20/x
  3. Step 3: Cross multiply
    6,822.40x = 10,214.40 × 6,131.20
  4. Step 4: Simplify right side
    6,822.40x = 62,626,529.28
  5. Step 5: Solve for x
    x = 62,626,529.28/6,822.40
  6. Step 6: Final answer
    x = 9,179.55

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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.