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Finding the Fourth Proportional to 15,522.73, 21,420.78 and 8,807.96

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Solution

The fourth proportional to 15,522.73, 21,420.78 and 8,807.96 is: 12,154.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,522.73 : 21,420.78 = 8,807.96 : x
  2. Step 2: Convert to fraction form
    15,522.73/21,420.78 = 8,807.96/x
  3. Step 3: Cross multiply
    15,522.73x = 21,420.78 × 8,807.96
  4. Step 4: Simplify right side
    15,522.73x = 188,673,388.58
  5. Step 5: Solve for x
    x = 188,673,388.58/15,522.73
  6. Step 6: Final answer
    x = 12,154.65

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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.