Home / 13,219.71-18,243.20-7,251.38

Finding the Fourth Proportional to 13,219.71, 18,243.20 and 7,251.38

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Solution

The fourth proportional to 13,219.71, 18,243.20 and 7,251.38 is: 10,006.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,219.71 : 18,243.20 = 7,251.38 : x
  2. Step 2: Convert to fraction form
    13,219.71/18,243.20 = 7,251.38/x
  3. Step 3: Cross multiply
    13,219.71x = 18,243.20 × 7,251.38
  4. Step 4: Simplify right side
    13,219.71x = 132,288,351.81
  5. Step 5: Solve for x
    x = 132,288,351.81/13,219.71
  6. Step 6: Final answer
    x = 10,006.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.