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Finding the Fourth Proportional to 14,293.97, 19,724.94 and 7,920.39

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Solution

The fourth proportional to 14,293.97, 19,724.94 and 7,920.39 is: 10,929.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,293.97 : 19,724.94 = 7,920.39 : x
  2. Step 2: Convert to fraction form
    14,293.97/19,724.94 = 7,920.39/x
  3. Step 3: Cross multiply
    14,293.97x = 19,724.94 × 7,920.39
  4. Step 4: Simplify right side
    14,293.97x = 156,229,217.53
  5. Step 5: Solve for x
    x = 156,229,217.53/14,293.97
  6. Step 6: Final answer
    x = 10,929.73

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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.