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Finding the Fourth Proportional to 15,651.68, 21,599.36 and 8,578.56

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Solution

The fourth proportional to 15,651.68, 21,599.36 and 8,578.56 is: 11,838.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,651.68 : 21,599.36 = 8,578.56 : x
  2. Step 2: Convert to fraction form
    15,651.68/21,599.36 = 8,578.56/x
  3. Step 3: Cross multiply
    15,651.68x = 21,599.36 × 8,578.56
  4. Step 4: Simplify right side
    15,651.68x = 185,291,405.72
  5. Step 5: Solve for x
    x = 185,291,405.72/15,651.68
  6. Step 6: Final answer
    x = 11,838.44

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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.