Home / 31,318.80-43,216.90-18,743.28

Finding the Fourth Proportional to 31,318.80, 43,216.90 and 18,743.28

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Solution

The fourth proportional to 31,318.80, 43,216.90 and 18,743.28 is: 25,863.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,318.80 : 43,216.90 = 18,743.28 : x
  2. Step 2: Convert to fraction form
    31,318.80/43,216.90 = 18,743.28/x
  3. Step 3: Cross multiply
    31,318.80x = 43,216.90 × 18,743.28
  4. Step 4: Simplify right side
    31,318.80x = 810,026,457.43
  5. Step 5: Solve for x
    x = 810,026,457.43/31,318.80
  6. Step 6: Final answer
    x = 25,863.90

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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.