Home / 31,240.36-43,129.52-20,660.68

Finding the Fourth Proportional to 31,240.36, 43,129.52 and 20,660.68

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Solution

The fourth proportional to 31,240.36, 43,129.52 and 20,660.68 is: 28,523.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,240.36 : 43,129.52 = 20,660.68 : x
  2. Step 2: Convert to fraction form
    31,240.36/43,129.52 = 20,660.68/x
  3. Step 3: Cross multiply
    31,240.36x = 43,129.52 × 20,660.68
  4. Step 4: Simplify right side
    31,240.36x = 891,085,211.27
  5. Step 5: Solve for x
    x = 891,085,211.27/31,240.36
  6. Step 6: Final answer
    x = 28,523.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.