Home / 20,543.78-28,350.36-11,112.32

Finding the Fourth Proportional to 20,543.78, 28,350.36 and 11,112.32

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Solution

The fourth proportional to 20,543.78, 28,350.36 and 11,112.32 is: 15,334.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,543.78 : 28,350.36 = 11,112.32 : x
  2. Step 2: Convert to fraction form
    20,543.78/28,350.36 = 11,112.32/x
  3. Step 3: Cross multiply
    20,543.78x = 28,350.36 × 11,112.32
  4. Step 4: Simplify right side
    20,543.78x = 315,038,272.44
  5. Step 5: Solve for x
    x = 315,038,272.44/20,543.78
  6. Step 6: Final answer
    x = 15,334.97

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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.