Home / 21,215.89-29,277.90-11,785.33

Finding the Fourth Proportional to 21,215.89, 29,277.90 and 11,785.33

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Solution

The fourth proportional to 21,215.89, 29,277.90 and 11,785.33 is: 16,263.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,215.89 : 29,277.90 = 11,785.33 : x
  2. Step 2: Convert to fraction form
    21,215.89/29,277.90 = 11,785.33/x
  3. Step 3: Cross multiply
    21,215.89x = 29,277.90 × 11,785.33
  4. Step 4: Simplify right side
    21,215.89x = 345,049,713.21
  5. Step 5: Solve for x
    x = 345,049,713.21/21,215.89
  6. Step 6: Final answer
    x = 16,263.74

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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.