Home / 20,542.70-28,348.85-11,111.26

Finding the Fourth Proportional to 20,542.70, 28,348.85 and 11,111.26

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Solution

The fourth proportional to 20,542.70, 28,348.85 and 11,111.26 is: 15,333.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,542.70 : 28,348.85 = 11,111.26 : x
  2. Step 2: Convert to fraction form
    20,542.70/28,348.85 = 11,111.26/x
  3. Step 3: Cross multiply
    20,542.70x = 28,348.85 × 11,111.26
  4. Step 4: Simplify right side
    20,542.70x = 314,991,443.05
  5. Step 5: Solve for x
    x = 314,991,443.05/20,542.70
  6. Step 6: Final answer
    x = 15,333.50

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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.