Home / 20,731.52-31,074.68-10,180.60

Finding the Fourth Proportional to 20,731.52, 31,074.68 and 10,180.60

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Solution

The fourth proportional to 20,731.52, 31,074.68 and 10,180.60 is: 15,259.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,731.52 : 31,074.68 = 10,180.60 : x
  2. Step 2: Convert to fraction form
    20,731.52/31,074.68 = 10,180.60/x
  3. Step 3: Cross multiply
    20,731.52x = 31,074.68 × 10,180.60
  4. Step 4: Simplify right side
    20,731.52x = 316,358,887.21
  5. Step 5: Solve for x
    x = 316,358,887.21/20,731.52
  6. Step 6: Final answer
    x = 15,259.80

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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.