Home / 21,112.31-29,122.29-13,942.29

Finding the Fourth Proportional to 21,112.31, 29,122.29 and 13,942.29

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Solution

The fourth proportional to 21,112.31, 29,122.29 and 13,942.29 is: 19,231.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,112.31 : 29,122.29 = 13,942.29 : x
  2. Step 2: Convert to fraction form
    21,112.31/29,122.29 = 13,942.29/x
  3. Step 3: Cross multiply
    21,112.31x = 29,122.29 × 13,942.29
  4. Step 4: Simplify right side
    21,112.31x = 406,031,397.25
  5. Step 5: Solve for x
    x = 406,031,397.25/21,112.31
  6. Step 6: Final answer
    x = 19,231.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.