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Finding the Fourth Proportional to 14,658.60, 21,979.80 and 4,792.80

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Solution

The fourth proportional to 14,658.60, 21,979.80 and 4,792.80 is: 7,186.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,658.60 : 21,979.80 = 4,792.80 : x
  2. Step 2: Convert to fraction form
    14,658.60/21,979.80 = 4,792.80/x
  3. Step 3: Cross multiply
    14,658.60x = 21,979.80 × 4,792.80
  4. Step 4: Simplify right side
    14,658.60x = 105,344,785.44
  5. Step 5: Solve for x
    x = 105,344,785.44/14,658.60
  6. Step 6: Final answer
    x = 7,186.55

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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.