Home / 20,729.52-31,071.68-10,178.59

Finding the Fourth Proportional to 20,729.52, 31,071.68 and 10,178.59

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Solution

The fourth proportional to 20,729.52, 31,071.68 and 10,178.59 is: 15,256.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,729.52 : 31,071.68 = 10,178.59 : x
  2. Step 2: Convert to fraction form
    20,729.52/31,071.68 = 10,178.59/x
  3. Step 3: Cross multiply
    20,729.52x = 31,071.68 × 10,178.59
  4. Step 4: Simplify right side
    20,729.52x = 316,265,840.44
  5. Step 5: Solve for x
    x = 316,265,840.44/20,729.52
  6. Step 6: Final answer
    x = 15,256.79

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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.