Home / 21,118.14-29,131.36-13,565.58

Finding the Fourth Proportional to 21,118.14, 29,131.36 and 13,565.58

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Solution

The fourth proportional to 21,118.14, 29,131.36 and 13,565.58 is: 18,713.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,118.14 : 29,131.36 = 13,565.58 : x
  2. Step 2: Convert to fraction form
    21,118.14/29,131.36 = 13,565.58/x
  3. Step 3: Cross multiply
    21,118.14x = 29,131.36 × 13,565.58
  4. Step 4: Simplify right side
    21,118.14x = 395,183,869.92
  5. Step 5: Solve for x
    x = 395,183,869.92/21,118.14
  6. Step 6: Final answer
    x = 18,713.01

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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.