Home / 10,631.78-15,947.68-8,774.90

Finding the Fourth Proportional to 10,631.78, 15,947.68 and 8,774.90

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Solution

The fourth proportional to 10,631.78, 15,947.68 and 8,774.90 is: 13,162.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,631.78 : 15,947.68 = 8,774.90 : x
  2. Step 2: Convert to fraction form
    10,631.78/15,947.68 = 8,774.90/x
  3. Step 3: Cross multiply
    10,631.78x = 15,947.68 × 8,774.90
  4. Step 4: Simplify right side
    10,631.78x = 139,939,297.23
  5. Step 5: Solve for x
    x = 139,939,297.23/10,631.78
  6. Step 6: Final answer
    x = 13,162.36

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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.