Home / 20,798.72-31,170.80-18,159.52

Finding the Fourth Proportional to 20,798.72, 31,170.80 and 18,159.52

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Solution

The fourth proportional to 20,798.72, 31,170.80 and 18,159.52 is: 27,215.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,798.72 : 31,170.80 = 18,159.52 : x
  2. Step 2: Convert to fraction form
    20,798.72/31,170.80 = 18,159.52/x
  3. Step 3: Cross multiply
    20,798.72x = 31,170.80 × 18,159.52
  4. Step 4: Simplify right side
    20,798.72x = 566,046,766.02
  5. Step 5: Solve for x
    x = 566,046,766.02/20,798.72
  6. Step 6: Final answer
    x = 27,215.46

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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.