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Finding the Fourth Proportional to 19,920.72, 27,493.08 and 11,424.22

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Solution

The fourth proportional to 19,920.72, 27,493.08 and 11,424.22 is: 15,766.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,920.72 : 27,493.08 = 11,424.22 : x
  2. Step 2: Convert to fraction form
    19,920.72/27,493.08 = 11,424.22/x
  3. Step 3: Cross multiply
    19,920.72x = 27,493.08 × 11,424.22
  4. Step 4: Simplify right side
    19,920.72x = 314,086,994.40
  5. Step 5: Solve for x
    x = 314,086,994.40/19,920.72
  6. Step 6: Final answer
    x = 15,766.85

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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.