Home / 21,185.88-29,234.30-13,117.06

Finding the Fourth Proportional to 21,185.88, 29,234.30 and 13,117.06

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Solution

The fourth proportional to 21,185.88, 29,234.30 and 13,117.06 is: 18,100.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,185.88 : 29,234.30 = 13,117.06 : x
  2. Step 2: Convert to fraction form
    21,185.88/29,234.30 = 13,117.06/x
  3. Step 3: Cross multiply
    21,185.88x = 29,234.30 × 13,117.06
  4. Step 4: Simplify right side
    21,185.88x = 383,468,067.16
  5. Step 5: Solve for x
    x = 383,468,067.16/21,185.88
  6. Step 6: Final answer
    x = 18,100.17

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Half scale
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Double scale
Find fourth proportional to 21,186.88, 29,235.68 and 13,118.06
Similar ratio
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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.