Home / 21,326.40-31,991.04-13,524.48

Finding the Fourth Proportional to 21,326.40, 31,991.04 and 13,524.48

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Solution

The fourth proportional to 21,326.40, 31,991.04 and 13,524.48 is: 20,287.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,326.40 : 31,991.04 = 13,524.48 : x
  2. Step 2: Convert to fraction form
    21,326.40/31,991.04 = 13,524.48/x
  3. Step 3: Cross multiply
    21,326.40x = 31,991.04 × 13,524.48
  4. Step 4: Simplify right side
    21,326.40x = 432,662,180.66
  5. Step 5: Solve for x
    x = 432,662,180.66/21,326.40
  6. Step 6: Final answer
    x = 20,287.63

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1.5x scale

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.