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Finding the Fourth Proportional to 43,395.30, 65,092.95 and 13,815.45

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Solution

The fourth proportional to 43,395.30, 65,092.95 and 13,815.45 is: 20,723.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,395.30 : 65,092.95 = 13,815.45 : x
  2. Step 2: Convert to fraction form
    43,395.30/65,092.95 = 13,815.45/x
  3. Step 3: Cross multiply
    43,395.30x = 65,092.95 × 13,815.45
  4. Step 4: Simplify right side
    43,395.30x = 899,288,396.08
  5. Step 5: Solve for x
    x = 899,288,396.08/43,395.30
  6. Step 6: Final answer
    x = 20,723.18

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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.