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Finding the Fourth Proportional to 18,921.46, 26,107.62 and 10,963.20

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Solution

The fourth proportional to 18,921.46, 26,107.62 and 10,963.20 is: 15,126.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,921.46 : 26,107.62 = 10,963.20 : x
  2. Step 2: Convert to fraction form
    18,921.46/26,107.62 = 10,963.20/x
  3. Step 3: Cross multiply
    18,921.46x = 26,107.62 × 10,963.20
  4. Step 4: Simplify right side
    18,921.46x = 286,223,059.58
  5. Step 5: Solve for x
    x = 286,223,059.58/18,921.46
  6. Step 6: Final answer
    x = 15,126.90

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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.