Home / 21,268.14-31,852.77-20,529.90

Finding the Fourth Proportional to 21,268.14, 31,852.77 and 20,529.90

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Solution

The fourth proportional to 21,268.14, 31,852.77 and 20,529.90 is: 30,747.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,268.14 : 31,852.77 = 20,529.90 : x
  2. Step 2: Convert to fraction form
    21,268.14/31,852.77 = 20,529.90/x
  3. Step 3: Cross multiply
    21,268.14x = 31,852.77 × 20,529.90
  4. Step 4: Simplify right side
    21,268.14x = 653,934,182.82
  5. Step 5: Solve for x
    x = 653,934,182.82/21,268.14
  6. Step 6: Final answer
    x = 30,747.13

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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.