Home / 21,279.73-31,859.58-11,261.79

Finding the Fourth Proportional to 21,279.73, 31,859.58 and 11,261.79

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Solution

The fourth proportional to 21,279.73, 31,859.58 and 11,261.79 is: 16,860.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,279.73 : 31,859.58 = 11,261.79 : x
  2. Step 2: Convert to fraction form
    21,279.73/31,859.58 = 11,261.79/x
  3. Step 3: Cross multiply
    21,279.73x = 31,859.58 × 11,261.79
  4. Step 4: Simplify right side
    21,279.73x = 358,795,899.45
  5. Step 5: Solve for x
    x = 358,795,899.45/21,279.73
  6. Step 6: Final answer
    x = 16,860.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.