Home / 20,542.87-28,349.15-11,111.43

Finding the Fourth Proportional to 20,542.87, 28,349.15 and 11,111.43

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Solution

The fourth proportional to 20,542.87, 28,349.15 and 11,111.43 is: 15,333.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,542.87 : 28,349.15 = 11,111.43 : x
  2. Step 2: Convert to fraction form
    20,542.87/28,349.15 = 11,111.43/x
  3. Step 3: Cross multiply
    20,542.87x = 28,349.15 × 11,111.43
  4. Step 4: Simplify right side
    20,542.87x = 314,999,540.23
  5. Step 5: Solve for x
    x = 314,999,540.23/20,542.87
  6. Step 6: Final answer
    x = 15,333.77

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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.