Home / 21,727.56-29,975.10-13,222.86

Finding the Fourth Proportional to 21,727.56, 29,975.10 and 13,222.86

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Solution

The fourth proportional to 21,727.56, 29,975.10 and 13,222.86 is: 18,242.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,727.56 : 29,975.10 = 13,222.86 : x
  2. Step 2: Convert to fraction form
    21,727.56/29,975.10 = 13,222.86/x
  3. Step 3: Cross multiply
    21,727.56x = 29,975.10 × 13,222.86
  4. Step 4: Simplify right side
    21,727.56x = 396,356,550.79
  5. Step 5: Solve for x
    x = 396,356,550.79/21,727.56
  6. Step 6: Final answer
    x = 18,242.11

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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.