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Finding the Fourth Proportional to 18,488.95, 27,712.61 and 9,109.11

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Solution

The fourth proportional to 18,488.95, 27,712.61 and 9,109.11 is: 13,653.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,488.95 : 27,712.61 = 9,109.11 : x
  2. Step 2: Convert to fraction form
    18,488.95/27,712.61 = 9,109.11/x
  3. Step 3: Cross multiply
    18,488.95x = 27,712.61 × 9,109.11
  4. Step 4: Simplify right side
    18,488.95x = 252,437,212.88
  5. Step 5: Solve for x
    x = 252,437,212.88/18,488.95
  6. Step 6: Final answer
    x = 13,653.41

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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.