Home / 20,617.19-28,451.72-11,185.74

Finding the Fourth Proportional to 20,617.19, 28,451.72 and 11,185.74

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Solution

The fourth proportional to 20,617.19, 28,451.72 and 11,185.74 is: 15,436.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,617.19 : 28,451.72 = 11,185.74 : x
  2. Step 2: Convert to fraction form
    20,617.19/28,451.72 = 11,185.74/x
  3. Step 3: Cross multiply
    20,617.19x = 28,451.72 × 11,185.74
  4. Step 4: Simplify right side
    20,617.19x = 318,253,486.54
  5. Step 5: Solve for x
    x = 318,253,486.54/20,617.19
  6. Step 6: Final answer
    x = 15,436.32

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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.