Home / 20,719.28-31,056.75-8,222.00

Finding the Fourth Proportional to 20,719.28, 31,056.75 and 8,222.00

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Solution

The fourth proportional to 20,719.28, 31,056.75 and 8,222.00 is: 12,324.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,719.28 : 31,056.75 = 8,222.00 : x
  2. Step 2: Convert to fraction form
    20,719.28/31,056.75 = 8,222.00/x
  3. Step 3: Cross multiply
    20,719.28x = 31,056.75 × 8,222.00
  4. Step 4: Simplify right side
    20,719.28x = 255,348,443.22
  5. Step 5: Solve for x
    x = 255,348,443.22/20,719.28
  6. Step 6: Final answer
    x = 12,324.19

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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.