Home / 21,521.69-29,687.94-19,999.47

Finding the Fourth Proportional to 21,521.69, 29,687.94 and 19,999.47

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Solution

The fourth proportional to 21,521.69, 29,687.94 and 19,999.47 is: 27,588.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,521.69 : 29,687.94 = 19,999.47 : x
  2. Step 2: Convert to fraction form
    21,521.69/29,687.94 = 19,999.47/x
  3. Step 3: Cross multiply
    21,521.69x = 29,687.94 × 19,999.47
  4. Step 4: Simplify right side
    21,521.69x = 593,743,065.39
  5. Step 5: Solve for x
    x = 593,743,065.39/21,521.69
  6. Step 6: Final answer
    x = 27,588.13

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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.