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Finding the Fourth Proportional to 15,846.11, 21,866.88 and 8,675.91

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Solution

The fourth proportional to 15,846.11, 21,866.88 and 8,675.91 is: 11,972.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,846.11 : 21,866.88 = 8,675.91 : x
  2. Step 2: Convert to fraction form
    15,846.11/21,866.88 = 8,675.91/x
  3. Step 3: Cross multiply
    15,846.11x = 21,866.88 × 8,675.91
  4. Step 4: Simplify right side
    15,846.11x = 189,715,066.59
  5. Step 5: Solve for x
    x = 189,715,066.59/15,846.11
  6. Step 6: Final answer
    x = 11,972.34

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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.