Home / 10,815.78-16,223.64-2,607.78

Finding the Fourth Proportional to 10,815.78, 16,223.64 and 2,607.78

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Solution

The fourth proportional to 10,815.78, 16,223.64 and 2,607.78 is: 3,911.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,815.78 : 16,223.64 = 2,607.78 : x
  2. Step 2: Convert to fraction form
    10,815.78/16,223.64 = 2,607.78/x
  3. Step 3: Cross multiply
    10,815.78x = 16,223.64 × 2,607.78
  4. Step 4: Simplify right side
    10,815.78x = 42,307,683.92
  5. Step 5: Solve for x
    x = 42,307,683.92/10,815.78
  6. Step 6: Final answer
    x = 3,911.66

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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.