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Finding the Fourth Proportional to 15,294.21, 21,104.11 and 8,578.90

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Solution

The fourth proportional to 15,294.21, 21,104.11 and 8,578.90 is: 11,837.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,294.21 : 21,104.11 = 8,578.90 : x
  2. Step 2: Convert to fraction form
    15,294.21/21,104.11 = 8,578.90/x
  3. Step 3: Cross multiply
    15,294.21x = 21,104.11 × 8,578.90
  4. Step 4: Simplify right side
    15,294.21x = 181,050,049.28
  5. Step 5: Solve for x
    x = 181,050,049.28/15,294.21
  6. Step 6: Final answer
    x = 11,837.82

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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.