Home / 13,219.96-18,243.81-7,251.28

Finding the Fourth Proportional to 13,219.96, 18,243.81 and 7,251.28

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Solution

The fourth proportional to 13,219.96, 18,243.81 and 7,251.28 is: 10,006.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,219.96 : 18,243.81 = 7,251.28 : x
  2. Step 2: Convert to fraction form
    13,219.96/18,243.81 = 7,251.28/x
  3. Step 3: Cross multiply
    13,219.96x = 18,243.81 × 7,251.28
  4. Step 4: Simplify right side
    13,219.96x = 132,290,974.58
  5. Step 5: Solve for x
    x = 132,290,974.58/13,219.96
  6. Step 6: Final answer
    x = 10,006.91

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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.