Home / 21,126.75-29,174.68-13,586.18

Finding the Fourth Proportional to 21,126.75, 29,174.68 and 13,586.18

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Solution

The fourth proportional to 21,126.75, 29,174.68 and 13,586.18 is: 18,761.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,126.75 : 29,174.68 = 13,586.18 : x
  2. Step 2: Convert to fraction form
    21,126.75/29,174.68 = 13,586.18/x
  3. Step 3: Cross multiply
    21,126.75x = 29,174.68 × 13,586.18
  4. Step 4: Simplify right side
    21,126.75x = 396,372,366.51
  5. Step 5: Solve for x
    x = 396,372,366.51/21,126.75
  6. Step 6: Final answer
    x = 18,761.63

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Double scale
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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.