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Finding the Fourth Proportional to 15,993.74, 22,071.12 and 8,919.98

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Solution

The fourth proportional to 15,993.74, 22,071.12 and 8,919.98 is: 12,309.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,993.74 : 22,071.12 = 8,919.98 : x
  2. Step 2: Convert to fraction form
    15,993.74/22,071.12 = 8,919.98/x
  3. Step 3: Cross multiply
    15,993.74x = 22,071.12 × 8,919.98
  4. Step 4: Simplify right side
    15,993.74x = 196,873,948.98
  5. Step 5: Solve for x
    x = 196,873,948.98/15,993.74
  6. Step 6: Final answer
    x = 12,309.44

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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.