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Finding the Fourth Proportional to 15,578.21, 21,497.18 and 8,863.21

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Solution

The fourth proportional to 15,578.21, 21,497.18 and 8,863.21 is: 12,230.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,578.21 : 21,497.18 = 8,863.21 : x
  2. Step 2: Convert to fraction form
    15,578.21/21,497.18 = 8,863.21/x
  3. Step 3: Cross multiply
    15,578.21x = 21,497.18 × 8,863.21
  4. Step 4: Simplify right side
    15,578.21x = 190,534,020.75
  5. Step 5: Solve for x
    x = 190,534,020.75/15,578.21
  6. Step 6: Final answer
    x = 12,230.80

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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.