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Finding the Fourth Proportional to 22,329.60, 30,815.36 and 12,393.60

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Solution

The fourth proportional to 22,329.60, 30,815.36 and 12,393.60 is: 17,103.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,329.60 : 30,815.36 = 12,393.60 : x
  2. Step 2: Convert to fraction form
    22,329.60/30,815.36 = 12,393.60/x
  3. Step 3: Cross multiply
    22,329.60x = 30,815.36 × 12,393.60
  4. Step 4: Simplify right side
    22,329.60x = 381,913,245.70
  5. Step 5: Solve for x
    x = 381,913,245.70/22,329.60
  6. Step 6: Final answer
    x = 17,103.45

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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.