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Finding the Fourth Proportional to 10,569.78, 15,860.10 and 5,375.64

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Solution

The fourth proportional to 10,569.78, 15,860.10 and 5,375.64 is: 8,066.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,569.78 : 15,860.10 = 5,375.64 : x
  2. Step 2: Convert to fraction form
    10,569.78/15,860.10 = 5,375.64/x
  3. Step 3: Cross multiply
    10,569.78x = 15,860.10 × 5,375.64
  4. Step 4: Simplify right side
    10,569.78x = 85,258,187.96
  5. Step 5: Solve for x
    x = 85,258,187.96/10,569.78
  6. Step 6: Final answer
    x = 8,066.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.