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Finding the Fourth Proportional to 18,967.84, 28,454.46 and 10,080.85

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Solution

The fourth proportional to 18,967.84, 28,454.46 and 10,080.85 is: 15,122.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,967.84 : 28,454.46 = 10,080.85 : x
  2. Step 2: Convert to fraction form
    18,967.84/28,454.46 = 10,080.85/x
  3. Step 3: Cross multiply
    18,967.84x = 28,454.46 × 10,080.85
  4. Step 4: Simplify right side
    18,967.84x = 286,845,143.09
  5. Step 5: Solve for x
    x = 286,845,143.09/18,967.84
  6. Step 6: Final answer
    x = 15,122.71

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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.