Home / 21,340.80-29,451.04-11,911.12

Finding the Fourth Proportional to 21,340.80, 29,451.04 and 11,911.12

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Solution

The fourth proportional to 21,340.80, 29,451.04 and 11,911.12 is: 16,437.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,340.80 : 29,451.04 = 11,911.12 : x
  2. Step 2: Convert to fraction form
    21,340.80/29,451.04 = 11,911.12/x
  3. Step 3: Cross multiply
    21,340.80x = 29,451.04 × 11,911.12
  4. Step 4: Simplify right side
    21,340.80x = 350,794,871.56
  5. Step 5: Solve for x
    x = 350,794,871.56/21,340.80
  6. Step 6: Final answer
    x = 16,437.76

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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.