Home / 15,821.82-21,833.21-8,747.79

Finding the Fourth Proportional to 15,821.82, 21,833.21 and 8,747.79

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Solution

The fourth proportional to 15,821.82, 21,833.21 and 8,747.79 is: 12,071.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,821.82 : 21,833.21 = 8,747.79 : x
  2. Step 2: Convert to fraction form
    15,821.82/21,833.21 = 8,747.79/x
  3. Step 3: Cross multiply
    15,821.82x = 21,833.21 × 8,747.79
  4. Step 4: Simplify right side
    15,821.82x = 190,992,336.11
  5. Step 5: Solve for x
    x = 190,992,336.11/15,821.82
  6. Step 6: Final answer
    x = 12,071.45

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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.