Home / 15,651.78-21,599.31-8,578.23

Finding the Fourth Proportional to 15,651.78, 21,599.31 and 8,578.23

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Solution

The fourth proportional to 15,651.78, 21,599.31 and 8,578.23 is: 11,837.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,651.78 : 21,599.31 = 8,578.23 : x
  2. Step 2: Convert to fraction form
    15,651.78/21,599.31 = 8,578.23/x
  3. Step 3: Cross multiply
    15,651.78x = 21,599.31 × 8,578.23
  4. Step 4: Simplify right side
    15,651.78x = 185,283,849.02
  5. Step 5: Solve for x
    x = 185,283,849.02/15,651.78
  6. Step 6: Final answer
    x = 11,837.88

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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.