Home / 21,239.82-29,308.77-13,282.92

Finding the Fourth Proportional to 21,239.82, 29,308.77 and 13,282.92

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Solution

The fourth proportional to 21,239.82, 29,308.77 and 13,282.92 is: 18,329.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,239.82 : 29,308.77 = 13,282.92 : x
  2. Step 2: Convert to fraction form
    21,239.82/29,308.77 = 13,282.92/x
  3. Step 3: Cross multiply
    21,239.82x = 29,308.77 × 13,282.92
  4. Step 4: Simplify right side
    21,239.82x = 389,306,047.21
  5. Step 5: Solve for x
    x = 389,306,047.21/21,239.82
  6. Step 6: Final answer
    x = 18,329.07

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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.