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Finding the Fourth Proportional to 18,891.45, 28,344.15 and 7,799.10

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Solution

The fourth proportional to 18,891.45, 28,344.15 and 7,799.10 is: 11,701.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,891.45 : 28,344.15 = 7,799.10 : x
  2. Step 2: Convert to fraction form
    18,891.45/28,344.15 = 7,799.10/x
  3. Step 3: Cross multiply
    18,891.45x = 28,344.15 × 7,799.10
  4. Step 4: Simplify right side
    18,891.45x = 221,058,860.27
  5. Step 5: Solve for x
    x = 221,058,860.27/18,891.45
  6. Step 6: Final answer
    x = 11,701.53

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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.