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Finding the Fourth Proportional to 15,774.12, 21,767.99 and 8,604.09

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Solution

The fourth proportional to 15,774.12, 21,767.99 and 8,604.09 is: 11,873.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,774.12 : 21,767.99 = 8,604.09 : x
  2. Step 2: Convert to fraction form
    15,774.12/21,767.99 = 8,604.09/x
  3. Step 3: Cross multiply
    15,774.12x = 21,767.99 × 8,604.09
  4. Step 4: Simplify right side
    15,774.12x = 187,293,702.06
  5. Step 5: Solve for x
    x = 187,293,702.06/15,774.12
  6. Step 6: Final answer
    x = 11,873.48

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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.