Home / 8,622.87-12,931.55-2,778.11

Finding the Fourth Proportional to 8,622.87, 12,931.55 and 2,778.11

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Solution

The fourth proportional to 8,622.87, 12,931.55 and 2,778.11 is: 4,166.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,622.87 : 12,931.55 = 2,778.11 : x
  2. Step 2: Convert to fraction form
    8,622.87/12,931.55 = 2,778.11/x
  3. Step 3: Cross multiply
    8,622.87x = 12,931.55 × 2,778.11
  4. Step 4: Simplify right side
    8,622.87x = 35,925,321.47
  5. Step 5: Solve for x
    x = 35,925,321.47/8,622.87
  6. Step 6: Final answer
    x = 4,166.28

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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.