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Finding the Fourth Proportional to 6,614.40, 9,921.40 and 2,231.49

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Solution

The fourth proportional to 6,614.40, 9,921.40 and 2,231.49 is: 3,347.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,614.40 : 9,921.40 = 2,231.49 : x
  2. Step 2: Convert to fraction form
    6,614.40/9,921.40 = 2,231.49/x
  3. Step 3: Cross multiply
    6,614.40x = 9,921.40 × 2,231.49
  4. Step 4: Simplify right side
    6,614.40x = 22,139,499.31
  5. Step 5: Solve for x
    x = 22,139,499.31/6,614.40
  6. Step 6: Final answer
    x = 3,347.17

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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.