Home / 20,427.78-30,632.10-8,579.02

Finding the Fourth Proportional to 20,427.78, 30,632.10 and 8,579.02

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Solution

The fourth proportional to 20,427.78, 30,632.10 and 8,579.02 is: 12,864.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,427.78 : 30,632.10 = 8,579.02 : x
  2. Step 2: Convert to fraction form
    20,427.78/30,632.10 = 8,579.02/x
  3. Step 3: Cross multiply
    20,427.78x = 30,632.10 × 8,579.02
  4. Step 4: Simplify right side
    20,427.78x = 262,793,398.54
  5. Step 5: Solve for x
    x = 262,793,398.54/20,427.78
  6. Step 6: Final answer
    x = 12,864.51

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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.