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Finding the Fourth Proportional to 12,392.46, 18,583.98 and 4,994.40

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Solution

The fourth proportional to 12,392.46, 18,583.98 and 4,994.40 is: 7,489.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,392.46 : 18,583.98 = 4,994.40 : x
  2. Step 2: Convert to fraction form
    12,392.46/18,583.98 = 4,994.40/x
  3. Step 3: Cross multiply
    12,392.46x = 18,583.98 × 4,994.40
  4. Step 4: Simplify right side
    12,392.46x = 92,815,829.71
  5. Step 5: Solve for x
    x = 92,815,829.71/12,392.46
  6. Step 6: Final answer
    x = 7,489.70

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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.