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Finding the Fourth Proportional to 8,418.53, 12,639.44 and 4,723.11

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Solution

The fourth proportional to 8,418.53, 12,639.44 and 4,723.11 is: 7,091.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,418.53 : 12,639.44 = 4,723.11 : x
  2. Step 2: Convert to fraction form
    8,418.53/12,639.44 = 4,723.11/x
  3. Step 3: Cross multiply
    8,418.53x = 12,639.44 × 4,723.11
  4. Step 4: Simplify right side
    8,418.53x = 59,697,477.27
  5. Step 5: Solve for x
    x = 59,697,477.27/8,418.53
  6. Step 6: Final answer
    x = 7,091.20

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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.