Home / 13,286.40-19,916.80-10,323.20

Finding the Fourth Proportional to 13,286.40, 19,916.80 and 10,323.20

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Solution

The fourth proportional to 13,286.40, 19,916.80 and 10,323.20 is: 15,474.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,286.40 : 19,916.80 = 10,323.20 : x
  2. Step 2: Convert to fraction form
    13,286.40/19,916.80 = 10,323.20/x
  3. Step 3: Cross multiply
    13,286.40x = 19,916.80 × 10,323.20
  4. Step 4: Simplify right side
    13,286.40x = 205,605,109.76
  5. Step 5: Solve for x
    x = 205,605,109.76/13,286.40
  6. Step 6: Final answer
    x = 15,474.85

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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.