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Finding the Fourth Proportional to 13,420.86, 18,521.61 and 7,452.57

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Solution

The fourth proportional to 13,420.86, 18,521.61 and 7,452.57 is: 10,285.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,420.86 : 18,521.61 = 7,452.57 : x
  2. Step 2: Convert to fraction form
    13,420.86/18,521.61 = 7,452.57/x
  3. Step 3: Cross multiply
    13,420.86x = 18,521.61 × 7,452.57
  4. Step 4: Simplify right side
    13,420.86x = 138,033,553.53
  5. Step 5: Solve for x
    x = 138,033,553.53/13,420.86
  6. Step 6: Final answer
    x = 10,285.00

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.