Home / 21,241.95-29,310.63-12,287.73

Finding the Fourth Proportional to 21,241.95, 29,310.63 and 12,287.73

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Solution

The fourth proportional to 21,241.95, 29,310.63 and 12,287.73 is: 16,955.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,241.95 : 29,310.63 = 12,287.73 : x
  2. Step 2: Convert to fraction form
    21,241.95/29,310.63 = 12,287.73/x
  3. Step 3: Cross multiply
    21,241.95x = 29,310.63 × 12,287.73
  4. Step 4: Simplify right side
    21,241.95x = 360,161,027.78
  5. Step 5: Solve for x
    x = 360,161,027.78/21,241.95
  6. Step 6: Final answer
    x = 16,955.18

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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.