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Finding the Fourth Proportional to 15,578.22, 21,499.83 and 8,865.48

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Solution

The fourth proportional to 15,578.22, 21,499.83 and 8,865.48 is: 12,235.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,578.22 : 21,499.83 = 8,865.48 : x
  2. Step 2: Convert to fraction form
    15,578.22/21,499.83 = 8,865.48/x
  3. Step 3: Cross multiply
    15,578.22x = 21,499.83 × 8,865.48
  4. Step 4: Simplify right side
    15,578.22x = 190,606,312.87
  5. Step 5: Solve for x
    x = 190,606,312.87/15,578.22
  6. Step 6: Final answer
    x = 12,235.44

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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.