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Finding the Fourth Proportional to 15,652.20, 21,599.82 and 8,578.20

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Solution

The fourth proportional to 15,652.20, 21,599.82 and 8,578.20 is: 11,837.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,652.20 : 21,599.82 = 8,578.20 : x
  2. Step 2: Convert to fraction form
    15,652.20/21,599.82 = 8,578.20/x
  3. Step 3: Cross multiply
    15,652.20x = 21,599.82 × 8,578.20
  4. Step 4: Simplify right side
    15,652.20x = 185,287,575.92
  5. Step 5: Solve for x
    x = 185,287,575.92/15,652.20
  6. Step 6: Final answer
    x = 11,837.80

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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.