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Finding the Fourth Proportional to 18,965.22, 26,137.10 and 15,200.84

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Solution

The fourth proportional to 18,965.22, 26,137.10 and 15,200.84 is: 20,949.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,965.22 : 26,137.10 = 15,200.84 : x
  2. Step 2: Convert to fraction form
    18,965.22/26,137.10 = 15,200.84/x
  3. Step 3: Cross multiply
    18,965.22x = 26,137.10 × 15,200.84
  4. Step 4: Simplify right side
    18,965.22x = 397,305,875.16
  5. Step 5: Solve for x
    x = 397,305,875.16/18,965.22
  6. Step 6: Final answer
    x = 20,949.18

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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.