Home / 20,982.11-31,457.75-9,882.54

Finding the Fourth Proportional to 20,982.11, 31,457.75 and 9,882.54

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Solution

The fourth proportional to 20,982.11, 31,457.75 and 9,882.54 is: 14,816.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,982.11 : 31,457.75 = 9,882.54 : x
  2. Step 2: Convert to fraction form
    20,982.11/31,457.75 = 9,882.54/x
  3. Step 3: Cross multiply
    20,982.11x = 31,457.75 × 9,882.54
  4. Step 4: Simplify right side
    20,982.11x = 310,882,423.27
  5. Step 5: Solve for x
    x = 310,882,423.27/20,982.11
  6. Step 6: Final answer
    x = 14,816.55

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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.