Home / 21,552.81-29,742.89-12,121.38

Finding the Fourth Proportional to 21,552.81, 29,742.89 and 12,121.38

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Solution

The fourth proportional to 21,552.81, 29,742.89 and 12,121.38 is: 16,727.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,552.81 : 29,742.89 = 12,121.38 : x
  2. Step 2: Convert to fraction form
    21,552.81/29,742.89 = 12,121.38/x
  3. Step 3: Cross multiply
    21,552.81x = 29,742.89 × 12,121.38
  4. Step 4: Simplify right side
    21,552.81x = 360,524,871.99
  5. Step 5: Solve for x
    x = 360,524,871.99/21,552.81
  6. Step 6: Final answer
    x = 16,727.51

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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.