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Finding the Fourth Proportional to 55,447.70, 83,171.55 and 18,511.70

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Solution

The fourth proportional to 55,447.70, 83,171.55 and 18,511.70 is: 27,767.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,447.70 : 83,171.55 = 18,511.70 : x
  2. Step 2: Convert to fraction form
    55,447.70/83,171.55 = 18,511.70/x
  3. Step 3: Cross multiply
    55,447.70x = 83,171.55 × 18,511.70
  4. Step 4: Simplify right side
    55,447.70x = 1,539,646,782.14
  5. Step 5: Solve for x
    x = 1,539,646,782.14/55,447.70
  6. Step 6: Final answer
    x = 27,767.55

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1.5x scale

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.