Home / 13,240.28-19,868.79-7,400.72

Finding the Fourth Proportional to 13,240.28, 19,868.79 and 7,400.72

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Solution

The fourth proportional to 13,240.28, 19,868.79 and 7,400.72 is: 11,105.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,240.28 : 19,868.79 = 7,400.72 : x
  2. Step 2: Convert to fraction form
    13,240.28/19,868.79 = 7,400.72/x
  3. Step 3: Cross multiply
    13,240.28x = 19,868.79 × 7,400.72
  4. Step 4: Simplify right side
    13,240.28x = 147,043,351.53
  5. Step 5: Solve for x
    x = 147,043,351.53/13,240.28
  6. Step 6: Final answer
    x = 11,105.76

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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.