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Finding the Fourth Proportional to 55,371.90, 83,057.86 and 13,818.90

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Solution

The fourth proportional to 55,371.90, 83,057.86 and 13,818.90 is: 20,728.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,371.90 : 83,057.86 = 13,818.90 : x
  2. Step 2: Convert to fraction form
    55,371.90/83,057.86 = 13,818.90/x
  3. Step 3: Cross multiply
    55,371.90x = 83,057.86 × 13,818.90
  4. Step 4: Simplify right side
    55,371.90x = 1,147,768,261.55
  5. Step 5: Solve for x
    x = 1,147,768,261.55/55,371.90
  6. Step 6: Final answer
    x = 20,728.35

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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.