Home / 21,405.28-29,540.40-11,974

Finding the Fourth Proportional to 21,405.28, 29,540.40 and 11,974

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Solution

The fourth proportional to 21,405.28, 29,540.40 and 11,974 is: 16,524.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,405.28 : 29,540.40 = 11,974 : x
  2. Step 2: Convert to fraction form
    21,405.28/29,540.40 = 11,974/x
  3. Step 3: Cross multiply
    21,405.28x = 29,540.40 × 11,974
  4. Step 4: Simplify right side
    21,405.28x = 353,716,749.60
  5. Step 5: Solve for x
    x = 353,716,749.60/21,405.28
  6. Step 6: Final answer
    x = 16,524.74

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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.