Home / 21,521.10-29,698.71-11,960.87

Finding the Fourth Proportional to 21,521.10, 29,698.71 and 11,960.87

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Solution

The fourth proportional to 21,521.10, 29,698.71 and 11,960.87 is: 16,505.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,521.10 : 29,698.71 = 11,960.87 : x
  2. Step 2: Convert to fraction form
    21,521.10/29,698.71 = 11,960.87/x
  3. Step 3: Cross multiply
    21,521.10x = 29,698.71 × 11,960.87
  4. Step 4: Simplify right side
    21,521.10x = 355,222,500.35
  5. Step 5: Solve for x
    x = 355,222,500.35/21,521.10
  6. Step 6: Final answer
    x = 16,505.78

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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.