Home / 31,361.60-43,281.28-20,732.80

Finding the Fourth Proportional to 31,361.60, 43,281.28 and 20,732.80

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Solution

The fourth proportional to 31,361.60, 43,281.28 and 20,732.80 is: 28,612.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,361.60 : 43,281.28 = 20,732.80 : x
  2. Step 2: Convert to fraction form
    31,361.60/43,281.28 = 20,732.80/x
  3. Step 3: Cross multiply
    31,361.60x = 43,281.28 × 20,732.80
  4. Step 4: Simplify right side
    31,361.60x = 897,342,121.98
  5. Step 5: Solve for x
    x = 897,342,121.98/31,361.60
  6. Step 6: Final answer
    x = 28,612.77

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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.