Home / 28,930.38-39,947.56-21,385.22

Finding the Fourth Proportional to 28,930.38, 39,947.56 and 21,385.22

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Solution

The fourth proportional to 28,930.38, 39,947.56 and 21,385.22 is: 29,529.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,930.38 : 39,947.56 = 21,385.22 : x
  2. Step 2: Convert to fraction form
    28,930.38/39,947.56 = 21,385.22/x
  3. Step 3: Cross multiply
    28,930.38x = 39,947.56 × 21,385.22
  4. Step 4: Simplify right side
    28,930.38x = 854,287,359.06
  5. Step 5: Solve for x
    x = 854,287,359.06/28,930.38
  6. Step 6: Final answer
    x = 29,529.07

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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.