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Finding the Fourth Proportional to 18,891.32, 28,337.03 and 9,028.36

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Solution

The fourth proportional to 18,891.32, 28,337.03 and 9,028.36 is: 13,542.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,891.32 : 28,337.03 = 9,028.36 : x
  2. Step 2: Convert to fraction form
    18,891.32/28,337.03 = 9,028.36/x
  3. Step 3: Cross multiply
    18,891.32x = 28,337.03 × 9,028.36
  4. Step 4: Simplify right side
    18,891.32x = 255,836,908.17
  5. Step 5: Solve for x
    x = 255,836,908.17/18,891.32
  6. Step 6: Final answer
    x = 13,542.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.