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Finding the Fourth Proportional to 43,508.66, 65,271.15 and 13,918.55

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Solution

The fourth proportional to 43,508.66, 65,271.15 and 13,918.55 is: 20,880.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,508.66 : 65,271.15 = 13,918.55 : x
  2. Step 2: Convert to fraction form
    43,508.66/65,271.15 = 13,918.55/x
  3. Step 3: Cross multiply
    43,508.66x = 65,271.15 × 13,918.55
  4. Step 4: Simplify right side
    43,508.66x = 908,479,438.48
  5. Step 5: Solve for x
    x = 908,479,438.48/43,508.66
  6. Step 6: Final answer
    x = 20,880.43

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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.