Home / 20,936.22-31,431-13,571.51

Finding the Fourth Proportional to 20,936.22, 31,431 and 13,571.51

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Solution

The fourth proportional to 20,936.22, 31,431 and 13,571.51 is: 20,374.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,936.22 : 31,431 = 13,571.51 : x
  2. Step 2: Convert to fraction form
    20,936.22/31,431 = 13,571.51/x
  3. Step 3: Cross multiply
    20,936.22x = 31,431 × 13,571.51
  4. Step 4: Simplify right side
    20,936.22x = 426,565,973.66
  5. Step 5: Solve for x
    x = 426,565,973.66/20,936.22
  6. Step 6: Final answer
    x = 20,374.55

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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.