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Finding the Fourth Proportional to 12,340.20, 18,513.18 and 3,575.28

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Solution

The fourth proportional to 12,340.20, 18,513.18 and 3,575.28 is: 5,363.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,340.20 : 18,513.18 = 3,575.28 : x
  2. Step 2: Convert to fraction form
    12,340.20/18,513.18 = 3,575.28/x
  3. Step 3: Cross multiply
    12,340.20x = 18,513.18 × 3,575.28
  4. Step 4: Simplify right side
    12,340.20x = 66,189,802.19
  5. Step 5: Solve for x
    x = 66,189,802.19/12,340.20
  6. Step 6: Final answer
    x = 5,363.75

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