Home / 20,542.53-28,348.75-11,111.10

Finding the Fourth Proportional to 20,542.53, 28,348.75 and 11,111.10

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Solution

The fourth proportional to 20,542.53, 28,348.75 and 11,111.10 is: 15,333.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,542.53 : 28,348.75 = 11,111.10 : x
  2. Step 2: Convert to fraction form
    20,542.53/28,348.75 = 11,111.10/x
  3. Step 3: Cross multiply
    20,542.53x = 28,348.75 × 11,111.10
  4. Step 4: Simplify right side
    20,542.53x = 314,985,796.13
  5. Step 5: Solve for x
    x = 314,985,796.13/20,542.53
  6. Step 6: Final answer
    x = 15,333.35

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Half scale
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Double scale
Find fourth proportional to 20,543.53, 28,350.13 and 11,112.10
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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.