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Finding the Fourth Proportional to 8,719.83, 12,039.16 and 6,699.64

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Solution

The fourth proportional to 8,719.83, 12,039.16 and 6,699.64 is: 9,249.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,719.83 : 12,039.16 = 6,699.64 : x
  2. Step 2: Convert to fraction form
    8,719.83/12,039.16 = 6,699.64/x
  3. Step 3: Cross multiply
    8,719.83x = 12,039.16 × 6,699.64
  4. Step 4: Simplify right side
    8,719.83x = 80,658,004.40
  5. Step 5: Solve for x
    x = 80,658,004.40/8,719.83
  6. Step 6: Final answer
    x = 9,249.95

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1.5x scale

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.