Home / 31,228.34-43,112.94-20,648.66

Finding the Fourth Proportional to 31,228.34, 43,112.94 and 20,648.66

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Solution

The fourth proportional to 31,228.34, 43,112.94 and 20,648.66 is: 28,506.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,228.34 : 43,112.94 = 20,648.66 : x
  2. Step 2: Convert to fraction form
    31,228.34/43,112.94 = 20,648.66/x
  3. Step 3: Cross multiply
    31,228.34x = 43,112.94 × 20,648.66
  4. Step 4: Simplify right side
    31,228.34x = 890,224,439.66
  5. Step 5: Solve for x
    x = 890,224,439.66/31,228.34
  6. Step 6: Final answer
    x = 28,506.94

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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.