Home / 31,718.12-43,751.18-20,402.36

Finding the Fourth Proportional to 31,718.12, 43,751.18 and 20,402.36

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Solution

The fourth proportional to 31,718.12, 43,751.18 and 20,402.36 is: 28,142.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,718.12 : 43,751.18 = 20,402.36 : x
  2. Step 2: Convert to fraction form
    31,718.12/43,751.18 = 20,402.36/x
  3. Step 3: Cross multiply
    31,718.12x = 43,751.18 × 20,402.36
  4. Step 4: Simplify right side
    31,718.12x = 892,627,324.78
  5. Step 5: Solve for x
    x = 892,627,324.78/31,718.12
  6. Step 6: Final answer
    x = 28,142.50

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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.