Home / 20,618.97-28,454.73-11,187.54

Finding the Fourth Proportional to 20,618.97, 28,454.73 and 11,187.54

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Solution

The fourth proportional to 20,618.97, 28,454.73 and 11,187.54 is: 15,439.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,618.97 : 28,454.73 = 11,187.54 : x
  2. Step 2: Convert to fraction form
    20,618.97/28,454.73 = 11,187.54/x
  3. Step 3: Cross multiply
    20,618.97x = 28,454.73 × 11,187.54
  4. Step 4: Simplify right side
    20,618.97x = 318,338,430.06
  5. Step 5: Solve for x
    x = 318,338,430.06/20,618.97
  6. Step 6: Final answer
    x = 15,439.10

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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.