Home / 20,542.56-28,348.96-11,111.28

Finding the Fourth Proportional to 20,542.56, 28,348.96 and 11,111.28

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Solution

The fourth proportional to 20,542.56, 28,348.96 and 11,111.28 is: 15,333.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,542.56 : 28,348.96 = 11,111.28 : x
  2. Step 2: Convert to fraction form
    20,542.56/28,348.96 = 11,111.28/x
  3. Step 3: Cross multiply
    20,542.56x = 28,348.96 × 11,111.28
  4. Step 4: Simplify right side
    20,542.56x = 314,993,232.27
  5. Step 5: Solve for x
    x = 314,993,232.27/20,542.56
  6. Step 6: Final answer
    x = 15,333.69

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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.