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Finding the Fourth Proportional to 15,166.74, 20,918.16 and 9,863.22

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Solution

The fourth proportional to 15,166.74, 20,918.16 and 9,863.22 is: 13,603.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,166.74 : 20,918.16 = 9,863.22 : x
  2. Step 2: Convert to fraction form
    15,166.74/20,918.16 = 9,863.22/x
  3. Step 3: Cross multiply
    15,166.74x = 20,918.16 × 9,863.22
  4. Step 4: Simplify right side
    15,166.74x = 206,320,414.08
  5. Step 5: Solve for x
    x = 206,320,414.08/15,166.74
  6. Step 6: Final answer
    x = 13,603.48

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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.