Home / 31,617.12-43,640.73-20,869.85

Finding the Fourth Proportional to 31,617.12, 43,640.73 and 20,869.85

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Solution

The fourth proportional to 31,617.12, 43,640.73 and 20,869.85 is: 28,806.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,617.12 : 43,640.73 = 20,869.85 : x
  2. Step 2: Convert to fraction form
    31,617.12/43,640.73 = 20,869.85/x
  3. Step 3: Cross multiply
    31,617.12x = 43,640.73 × 20,869.85
  4. Step 4: Simplify right side
    31,617.12x = 910,775,270.79
  5. Step 5: Solve for x
    x = 910,775,270.79/31,617.12
  6. Step 6: Final answer
    x = 28,806.40

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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.