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Finding the Fourth Proportional to 12,390.48, 18,583.48 and 4,994.64

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Solution

The fourth proportional to 12,390.48, 18,583.48 and 4,994.64 is: 7,491.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,390.48 : 18,583.48 = 4,994.64 : x
  2. Step 2: Convert to fraction form
    12,390.48/18,583.48 = 4,994.64/x
  3. Step 3: Cross multiply
    12,390.48x = 18,583.48 × 4,994.64
  4. Step 4: Simplify right side
    12,390.48x = 92,817,792.55
  5. Step 5: Solve for x
    x = 92,817,792.55/12,390.48
  6. Step 6: Final answer
    x = 7,491.06

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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.