Home / 21,284.40-29,372.76-11,853.20

Finding the Fourth Proportional to 21,284.40, 29,372.76 and 11,853.20

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Solution

The fourth proportional to 21,284.40, 29,372.76 and 11,853.20 is: 16,357.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,284.40 : 29,372.76 = 11,853.20 : x
  2. Step 2: Convert to fraction form
    21,284.40/29,372.76 = 11,853.20/x
  3. Step 3: Cross multiply
    21,284.40x = 29,372.76 × 11,853.20
  4. Step 4: Simplify right side
    21,284.40x = 348,161,198.83
  5. Step 5: Solve for x
    x = 348,161,198.83/21,284.40
  6. Step 6: Final answer
    x = 16,357.58

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Double scale
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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.