Home / 31,563.60-43,559.88-18,139.20

Finding the Fourth Proportional to 31,563.60, 43,559.88 and 18,139.20

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Solution

The fourth proportional to 31,563.60, 43,559.88 and 18,139.20 is: 25,033.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,563.60 : 43,559.88 = 18,139.20 : x
  2. Step 2: Convert to fraction form
    31,563.60/43,559.88 = 18,139.20/x
  3. Step 3: Cross multiply
    31,563.60x = 43,559.88 × 18,139.20
  4. Step 4: Simplify right side
    31,563.60x = 790,141,375.30
  5. Step 5: Solve for x
    x = 790,141,375.30/31,563.60
  6. Step 6: Final answer
    x = 25,033.31

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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.