Home / 20,953.97-31,418.60-10,423.56

Finding the Fourth Proportional to 20,953.97, 31,418.60 and 10,423.56

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Solution

The fourth proportional to 20,953.97, 31,418.60 and 10,423.56 is: 15,629.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,953.97 : 31,418.60 = 10,423.56 : x
  2. Step 2: Convert to fraction form
    20,953.97/31,418.60 = 10,423.56/x
  3. Step 3: Cross multiply
    20,953.97x = 31,418.60 × 10,423.56
  4. Step 4: Simplify right side
    20,953.97x = 327,493,610.10
  5. Step 5: Solve for x
    x = 327,493,610.10/20,953.97
  6. Step 6: Final answer
    x = 15,629.20

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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.