Home / 22,381.66-30,869.91-21,389.02

Finding the Fourth Proportional to 22,381.66, 30,869.91 and 21,389.02

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Solution

The fourth proportional to 22,381.66, 30,869.91 and 21,389.02 is: 29,500.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,381.66 : 30,869.91 = 21,389.02 : x
  2. Step 2: Convert to fraction form
    22,381.66/30,869.91 = 21,389.02/x
  3. Step 3: Cross multiply
    22,381.66x = 30,869.91 × 21,389.02
  4. Step 4: Simplify right side
    22,381.66x = 660,277,122.39
  5. Step 5: Solve for x
    x = 660,277,122.39/22,381.66
  6. Step 6: Final answer
    x = 29,500.81

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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.