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Finding the Fourth Proportional to 8,653.84, 11,943.86 and 5,118.80

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Solution

The fourth proportional to 8,653.84, 11,943.86 and 5,118.80 is: 7,064.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,653.84 : 11,943.86 = 5,118.80 : x
  2. Step 2: Convert to fraction form
    8,653.84/11,943.86 = 5,118.80/x
  3. Step 3: Cross multiply
    8,653.84x = 11,943.86 × 5,118.80
  4. Step 4: Simplify right side
    8,653.84x = 61,138,145.25
  5. Step 5: Solve for x
    x = 61,138,145.25/8,653.84
  6. Step 6: Final answer
    x = 7,064.86

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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.