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Finding the Fourth Proportional to 8,653.84, 12,979.64 and 3,658.18

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Solution

The fourth proportional to 8,653.84, 12,979.64 and 3,658.18 is: 5,486.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,653.84 : 12,979.64 = 3,658.18 : x
  2. Step 2: Convert to fraction form
    8,653.84/12,979.64 = 3,658.18/x
  3. Step 3: Cross multiply
    8,653.84x = 12,979.64 × 3,658.18
  4. Step 4: Simplify right side
    8,653.84x = 47,481,859.46
  5. Step 5: Solve for x
    x = 47,481,859.46/8,653.84
  6. Step 6: Final answer
    x = 5,486.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.