Home / 28,921.96-39,947.70-20,951.56

Finding the Fourth Proportional to 28,921.96, 39,947.70 and 20,951.56

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Solution

The fourth proportional to 28,921.96, 39,947.70 and 20,951.56 is: 28,938.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,921.96 : 39,947.70 = 20,951.56 : x
  2. Step 2: Convert to fraction form
    28,921.96/39,947.70 = 20,951.56/x
  3. Step 3: Cross multiply
    28,921.96x = 39,947.70 × 20,951.56
  4. Step 4: Simplify right side
    28,921.96x = 836,966,633.41
  5. Step 5: Solve for x
    x = 836,966,633.41/28,921.96
  6. Step 6: Final answer
    x = 28,938.79

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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.