Home / 22,153.21-30,555.66-21,420.97

Finding the Fourth Proportional to 22,153.21, 30,555.66 and 21,420.97

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Solution

The fourth proportional to 22,153.21, 30,555.66 and 21,420.97 is: 29,545.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,153.21 : 30,555.66 = 21,420.97 : x
  2. Step 2: Convert to fraction form
    22,153.21/30,555.66 = 21,420.97/x
  3. Step 3: Cross multiply
    22,153.21x = 30,555.66 × 21,420.97
  4. Step 4: Simplify right side
    22,153.21x = 654,531,876.19
  5. Step 5: Solve for x
    x = 654,531,876.19/22,153.21
  6. Step 6: Final answer
    x = 29,545.69

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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.