Home / 21,188.40-29,241.36-12,236.28

Finding the Fourth Proportional to 21,188.40, 29,241.36 and 12,236.28

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Solution

The fourth proportional to 21,188.40, 29,241.36 and 12,236.28 is: 16,886.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,188.40 : 29,241.36 = 12,236.28 : x
  2. Step 2: Convert to fraction form
    21,188.40/29,241.36 = 12,236.28/x
  3. Step 3: Cross multiply
    21,188.40x = 29,241.36 × 12,236.28
  4. Step 4: Simplify right side
    21,188.40x = 357,805,468.54
  5. Step 5: Solve for x
    x = 357,805,468.54/21,188.40
  6. Step 6: Final answer
    x = 16,886.86

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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.