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Finding the Fourth Proportional to 8,977.13, 12,388.05 and 5,199.99

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Solution

The fourth proportional to 8,977.13, 12,388.05 and 5,199.99 is: 7,175.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,977.13 : 12,388.05 = 5,199.99 : x
  2. Step 2: Convert to fraction form
    8,977.13/12,388.05 = 5,199.99/x
  3. Step 3: Cross multiply
    8,977.13x = 12,388.05 × 5,199.99
  4. Step 4: Simplify right side
    8,977.13x = 64,417,736.12
  5. Step 5: Solve for x
    x = 64,417,736.12/8,977.13
  6. Step 6: Final answer
    x = 7,175.76

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.