Home / 20,851.80-31,277.76-10,461.12

Finding the Fourth Proportional to 20,851.80, 31,277.76 and 10,461.12

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Solution

The fourth proportional to 20,851.80, 31,277.76 and 10,461.12 is: 15,691.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,851.80 : 31,277.76 = 10,461.12 : x
  2. Step 2: Convert to fraction form
    20,851.80/31,277.76 = 10,461.12/x
  3. Step 3: Cross multiply
    20,851.80x = 31,277.76 × 10,461.12
  4. Step 4: Simplify right side
    20,851.80x = 327,200,400.69
  5. Step 5: Solve for x
    x = 327,200,400.69/20,851.80
  6. Step 6: Final answer
    x = 15,691.71

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1.5x scale

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.