Home / 31,821.80-43,904.20-18,388.16

Finding the Fourth Proportional to 31,821.80, 43,904.20 and 18,388.16

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Solution

The fourth proportional to 31,821.80, 43,904.20 and 18,388.16 is: 25,369.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,821.80 : 43,904.20 = 18,388.16 : x
  2. Step 2: Convert to fraction form
    31,821.80/43,904.20 = 18,388.16/x
  3. Step 3: Cross multiply
    31,821.80x = 43,904.20 × 18,388.16
  4. Step 4: Simplify right side
    31,821.80x = 807,317,454.27
  5. Step 5: Solve for x
    x = 807,317,454.27/31,821.80
  6. Step 6: Final answer
    x = 25,369.95

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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.