Home / 31,660.20-43,689.78-20,313.72

Finding the Fourth Proportional to 31,660.20, 43,689.78 and 20,313.72

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Solution

The fourth proportional to 31,660.20, 43,689.78 and 20,313.72 is: 28,032.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,660.20 : 43,689.78 = 20,313.72 : x
  2. Step 2: Convert to fraction form
    31,660.20/43,689.78 = 20,313.72/x
  3. Step 3: Cross multiply
    31,660.20x = 43,689.78 × 20,313.72
  4. Step 4: Simplify right side
    31,660.20x = 887,501,957.78
  5. Step 5: Solve for x
    x = 887,501,957.78/31,660.20
  6. Step 6: Final answer
    x = 28,032.10

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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.