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Finding the Fourth Proportional to 15,651.60, 21,599.73 and 8,578.02

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Solution

The fourth proportional to 15,651.60, 21,599.73 and 8,578.02 is: 11,837.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,651.60 : 21,599.73 = 8,578.02 : x
  2. Step 2: Convert to fraction form
    15,651.60/21,599.73 = 8,578.02/x
  3. Step 3: Cross multiply
    15,651.60x = 21,599.73 × 8,578.02
  4. Step 4: Simplify right side
    15,651.60x = 185,282,915.93
  5. Step 5: Solve for x
    x = 185,282,915.93/15,651.60
  6. Step 6: Final answer
    x = 11,837.95

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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.