Home / 21,521.31-29,687.42-19,999.07

Finding the Fourth Proportional to 21,521.31, 29,687.42 and 19,999.07

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Solution

The fourth proportional to 21,521.31, 29,687.42 and 19,999.07 is: 27,587.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,521.31 : 29,687.42 = 19,999.07 : x
  2. Step 2: Convert to fraction form
    21,521.31/29,687.42 = 19,999.07/x
  3. Step 3: Cross multiply
    21,521.31x = 29,687.42 × 19,999.07
  4. Step 4: Simplify right side
    21,521.31x = 593,720,914.92
  5. Step 5: Solve for x
    x = 593,720,914.92/21,521.31
  6. Step 6: Final answer
    x = 27,587.58

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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.