Home / 21,340.64-29,450.40-11,909.92

Finding the Fourth Proportional to 21,340.64, 29,450.40 and 11,909.92

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Solution

The fourth proportional to 21,340.64, 29,450.40 and 11,909.92 is: 16,435.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,340.64 : 29,450.40 = 11,909.92 : x
  2. Step 2: Convert to fraction form
    21,340.64/29,450.40 = 11,909.92/x
  3. Step 3: Cross multiply
    21,340.64x = 29,450.40 × 11,909.92
  4. Step 4: Simplify right side
    21,340.64x = 350,751,907.97
  5. Step 5: Solve for x
    x = 350,751,907.97/21,340.64
  6. Step 6: Final answer
    x = 16,435.87

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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.