Home / 31,371.60-43,295.08-20,742.80

Finding the Fourth Proportional to 31,371.60, 43,295.08 and 20,742.80

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Solution

The fourth proportional to 31,371.60, 43,295.08 and 20,742.80 is: 28,626.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,371.60 : 43,295.08 = 20,742.80 : x
  2. Step 2: Convert to fraction form
    31,371.60/43,295.08 = 20,742.80/x
  3. Step 3: Cross multiply
    31,371.60x = 43,295.08 × 20,742.80
  4. Step 4: Simplify right side
    31,371.60x = 898,061,185.42
  5. Step 5: Solve for x
    x = 898,061,185.42/31,371.60
  6. Step 6: Final answer
    x = 28,626.57

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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.