Home / 21,340.72-29,450.16-11,909.28

Finding the Fourth Proportional to 21,340.72, 29,450.16 and 11,909.28

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Solution

The fourth proportional to 21,340.72, 29,450.16 and 11,909.28 is: 16,434.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,340.72 : 29,450.16 = 11,909.28 : x
  2. Step 2: Convert to fraction form
    21,340.72/29,450.16 = 11,909.28/x
  3. Step 3: Cross multiply
    21,340.72x = 29,450.16 × 11,909.28
  4. Step 4: Simplify right side
    21,340.72x = 350,730,201.48
  5. Step 5: Solve for x
    x = 350,730,201.48/21,340.72
  6. Step 6: Final answer
    x = 16,434.79

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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.