Home / 21,278.38-29,362.35-11,847.82

Finding the Fourth Proportional to 21,278.38, 29,362.35 and 11,847.82

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Solution

The fourth proportional to 21,278.38, 29,362.35 and 11,847.82 is: 16,348.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,278.38 : 29,362.35 = 11,847.82 : x
  2. Step 2: Convert to fraction form
    21,278.38/29,362.35 = 11,847.82/x
  3. Step 3: Cross multiply
    21,278.38x = 29,362.35 × 11,847.82
  4. Step 4: Simplify right side
    21,278.38x = 347,879,837.58
  5. Step 5: Solve for x
    x = 347,879,837.58/21,278.38
  6. Step 6: Final answer
    x = 16,348.98

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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.