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Finding the Fourth Proportional to 15,992.89, 22,071.06 and 8,919.28

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Solution

The fourth proportional to 15,992.89, 22,071.06 and 8,919.28 is: 12,309.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,992.89 : 22,071.06 = 8,919.28 : x
  2. Step 2: Convert to fraction form
    15,992.89/22,071.06 = 8,919.28/x
  3. Step 3: Cross multiply
    15,992.89x = 22,071.06 × 8,919.28
  4. Step 4: Simplify right side
    15,992.89x = 196,857,964.04
  5. Step 5: Solve for x
    x = 196,857,964.04/15,992.89
  6. Step 6: Final answer
    x = 12,309.09

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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.