Home / 21,581.70-29,768.22-13,617.24

Finding the Fourth Proportional to 21,581.70, 29,768.22 and 13,617.24

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Solution

The fourth proportional to 21,581.70, 29,768.22 and 13,617.24 is: 18,782.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,581.70 : 29,768.22 = 13,617.24 : x
  2. Step 2: Convert to fraction form
    21,581.70/29,768.22 = 13,617.24/x
  3. Step 3: Cross multiply
    21,581.70x = 29,768.22 × 13,617.24
  4. Step 4: Simplify right side
    21,581.70x = 405,360,996.11
  5. Step 5: Solve for x
    x = 405,360,996.11/21,581.70
  6. Step 6: Final answer
    x = 18,782.63

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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.