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Finding the Fourth Proportional to 19,872.94, 27,424.11 and 10,920.44

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Solution

The fourth proportional to 19,872.94, 27,424.11 and 10,920.44 is: 15,069.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,872.94 : 27,424.11 = 10,920.44 : x
  2. Step 2: Convert to fraction form
    19,872.94/27,424.11 = 10,920.44/x
  3. Step 3: Cross multiply
    19,872.94x = 27,424.11 × 10,920.44
  4. Step 4: Simplify right side
    19,872.94x = 299,483,347.81
  5. Step 5: Solve for x
    x = 299,483,347.81/19,872.94
  6. Step 6: Final answer
    x = 15,069.91

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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.