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Finding the Fourth Proportional to 29,171.80, 43,779.30 and 21,395.80

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Solution

The fourth proportional to 29,171.80, 43,779.30 and 21,395.80 is: 32,109.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,171.80 : 43,779.30 = 21,395.80 : x
  2. Step 2: Convert to fraction form
    29,171.80/43,779.30 = 21,395.80/x
  3. Step 3: Cross multiply
    29,171.80x = 43,779.30 × 21,395.80
  4. Step 4: Simplify right side
    29,171.80x = 936,693,146.94
  5. Step 5: Solve for x
    x = 936,693,146.94/29,171.80
  6. Step 6: Final answer
    x = 32,109.54

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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.