Home / 21,110.13-29,105.55-15,440.31

Finding the Fourth Proportional to 21,110.13, 29,105.55 and 15,440.31

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Solution

The fourth proportional to 21,110.13, 29,105.55 and 15,440.31 is: 21,288.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,110.13 : 29,105.55 = 15,440.31 : x
  2. Step 2: Convert to fraction form
    21,110.13/29,105.55 = 15,440.31/x
  3. Step 3: Cross multiply
    21,110.13x = 29,105.55 × 15,440.31
  4. Step 4: Simplify right side
    21,110.13x = 449,398,714.72
  5. Step 5: Solve for x
    x = 449,398,714.72/21,110.13
  6. Step 6: Final answer
    x = 21,288.30

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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.