Home / 21,120.25-29,145.50-11,560.14

Finding the Fourth Proportional to 21,120.25, 29,145.50 and 11,560.14

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Solution

The fourth proportional to 21,120.25, 29,145.50 and 11,560.14 is: 15,952.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,120.25 : 29,145.50 = 11,560.14 : x
  2. Step 2: Convert to fraction form
    21,120.25/29,145.50 = 11,560.14/x
  3. Step 3: Cross multiply
    21,120.25x = 29,145.50 × 11,560.14
  4. Step 4: Simplify right side
    21,120.25x = 336,925,856.84
  5. Step 5: Solve for x
    x = 336,925,856.84/21,120.25
  6. Step 6: Final answer
    x = 15,952.74

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Half scale
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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.