Home / 31,641.60-43,679.36-18,899.20

Finding the Fourth Proportional to 31,641.60, 43,679.36 and 18,899.20

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Solution

The fourth proportional to 31,641.60, 43,679.36 and 18,899.20 is: 26,089.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,641.60 : 43,679.36 = 18,899.20 : x
  2. Step 2: Convert to fraction form
    31,641.60/43,679.36 = 18,899.20/x
  3. Step 3: Cross multiply
    31,641.60x = 43,679.36 × 18,899.20
  4. Step 4: Simplify right side
    31,641.60x = 825,504,960.51
  5. Step 5: Solve for x
    x = 825,504,960.51/31,641.60
  6. Step 6: Final answer
    x = 26,089.23

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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.