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Finding the Fourth Proportional to 15,993.87, 22,071.58 and 8,920.75

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Solution

The fourth proportional to 15,993.87, 22,071.58 and 8,920.75 is: 12,310.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,993.87 : 22,071.58 = 8,920.75 : x
  2. Step 2: Convert to fraction form
    15,993.87/22,071.58 = 8,920.75/x
  3. Step 3: Cross multiply
    15,993.87x = 22,071.58 × 8,920.75
  4. Step 4: Simplify right side
    15,993.87x = 196,894,969.80
  5. Step 5: Solve for x
    x = 196,894,969.80/15,993.87
  6. Step 6: Final answer
    x = 12,310.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.