Home / 11,679.10-16,117.60-6,643.78

Finding the Fourth Proportional to 11,679.10, 16,117.60 and 6,643.78

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Solution

The fourth proportional to 11,679.10, 16,117.60 and 6,643.78 is: 9,168.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,679.10 : 16,117.60 = 6,643.78 : x
  2. Step 2: Convert to fraction form
    11,679.10/16,117.60 = 6,643.78/x
  3. Step 3: Cross multiply
    11,679.10x = 16,117.60 × 6,643.78
  4. Step 4: Simplify right side
    11,679.10x = 107,081,731.62
  5. Step 5: Solve for x
    x = 107,081,731.62/11,679.10
  6. Step 6: Final answer
    x = 9,168.66

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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.