Home / 20,837.20-31,255.50-5,254.72

Finding the Fourth Proportional to 20,837.20, 31,255.50 and 5,254.72

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Solution

The fourth proportional to 20,837.20, 31,255.50 and 5,254.72 is: 7,882.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,837.20 : 31,255.50 = 5,254.72 : x
  2. Step 2: Convert to fraction form
    20,837.20/31,255.50 = 5,254.72/x
  3. Step 3: Cross multiply
    20,837.20x = 31,255.50 × 5,254.72
  4. Step 4: Simplify right side
    20,837.20x = 164,238,900.96
  5. Step 5: Solve for x
    x = 164,238,900.96/20,837.20
  6. Step 6: Final answer
    x = 7,882.00

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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.