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Finding the Fourth Proportional to 18,954.61, 28,431.92 and 5,805.30

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Solution

The fourth proportional to 18,954.61, 28,431.92 and 5,805.30 is: 8,707.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,954.61 : 28,431.92 = 5,805.30 : x
  2. Step 2: Convert to fraction form
    18,954.61/28,431.92 = 5,805.30/x
  3. Step 3: Cross multiply
    18,954.61x = 28,431.92 × 5,805.30
  4. Step 4: Simplify right side
    18,954.61x = 165,055,825.18
  5. Step 5: Solve for x
    x = 165,055,825.18/18,954.61
  6. Step 6: Final answer
    x = 8,707.95

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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.