Home / 28,858.12-43,243.40-21,427.80

Finding the Fourth Proportional to 28,858.12, 43,243.40 and 21,427.80

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Solution

The fourth proportional to 28,858.12, 43,243.40 and 21,427.80 is: 32,109.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,858.12 : 43,243.40 = 21,427.80 : x
  2. Step 2: Convert to fraction form
    28,858.12/43,243.40 = 21,427.80/x
  3. Step 3: Cross multiply
    28,858.12x = 43,243.40 × 21,427.80
  4. Step 4: Simplify right side
    28,858.12x = 926,610,926.52
  5. Step 5: Solve for x
    x = 926,610,926.52/28,858.12
  6. Step 6: Final answer
    x = 32,109.19

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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.