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Finding the Fourth Proportional to 8,643.10, 11,927.86 and 4,867.80

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Solution

The fourth proportional to 8,643.10, 11,927.86 and 4,867.80 is: 6,717.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,643.10 : 11,927.86 = 4,867.80 : x
  2. Step 2: Convert to fraction form
    8,643.10/11,927.86 = 4,867.80/x
  3. Step 3: Cross multiply
    8,643.10x = 11,927.86 × 4,867.80
  4. Step 4: Simplify right side
    8,643.10x = 58,062,436.91
  5. Step 5: Solve for x
    x = 58,062,436.91/8,643.10
  6. Step 6: Final answer
    x = 6,717.78

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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.