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Finding the Fourth Proportional to 8,486.64, 11,670.48 and 6,786.72

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Solution

The fourth proportional to 8,486.64, 11,670.48 and 6,786.72 is: 9,332.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,486.64 : 11,670.48 = 6,786.72 : x
  2. Step 2: Convert to fraction form
    8,486.64/11,670.48 = 6,786.72/x
  3. Step 3: Cross multiply
    8,486.64x = 11,670.48 × 6,786.72
  4. Step 4: Simplify right side
    8,486.64x = 79,204,280.03
  5. Step 5: Solve for x
    x = 79,204,280.03/8,486.64
  6. Step 6: Final answer
    x = 9,332.82

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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.