Home / 21,622.29-29,830.17-13,121.29

Finding the Fourth Proportional to 21,622.29, 29,830.17 and 13,121.29

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Solution

The fourth proportional to 21,622.29, 29,830.17 and 13,121.29 is: 18,102.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,622.29 : 29,830.17 = 13,121.29 : x
  2. Step 2: Convert to fraction form
    21,622.29/29,830.17 = 13,121.29/x
  3. Step 3: Cross multiply
    21,622.29x = 29,830.17 × 13,121.29
  4. Step 4: Simplify right side
    21,622.29x = 391,410,311.32
  5. Step 5: Solve for x
    x = 391,410,311.32/21,622.29
  6. Step 6: Final answer
    x = 18,102.17

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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.