Home / 21,991.38-32,998.41-10,305.78

Finding the Fourth Proportional to 21,991.38, 32,998.41 and 10,305.78

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Solution

The fourth proportional to 21,991.38, 32,998.41 and 10,305.78 is: 15,463.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,991.38 : 32,998.41 = 10,305.78 : x
  2. Step 2: Convert to fraction form
    21,991.38/32,998.41 = 10,305.78/x
  3. Step 3: Cross multiply
    21,991.38x = 32,998.41 × 10,305.78
  4. Step 4: Simplify right side
    21,991.38x = 340,074,353.81
  5. Step 5: Solve for x
    x = 340,074,353.81/21,991.38
  6. Step 6: Final answer
    x = 15,463.98

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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.