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Finding the Fourth Proportional to 18,805.80, 28,176.30 and 9,907.95

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Solution

The fourth proportional to 18,805.80, 28,176.30 and 9,907.95 is: 14,844.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,805.80 : 28,176.30 = 9,907.95 : x
  2. Step 2: Convert to fraction form
    18,805.80/28,176.30 = 9,907.95/x
  3. Step 3: Cross multiply
    18,805.80x = 28,176.30 × 9,907.95
  4. Step 4: Simplify right side
    18,805.80x = 279,169,371.59
  5. Step 5: Solve for x
    x = 279,169,371.59/18,805.80
  6. Step 6: Final answer
    x = 14,844.85

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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.