Home / 15,175.12-20,890.96-11,391.91

Finding the Fourth Proportional to 15,175.12, 20,890.96 and 11,391.91

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Solution

The fourth proportional to 15,175.12, 20,890.96 and 11,391.91 is: 15,682.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,175.12 : 20,890.96 = 11,391.91 : x
  2. Step 2: Convert to fraction form
    15,175.12/20,890.96 = 11,391.91/x
  3. Step 3: Cross multiply
    15,175.12x = 20,890.96 × 11,391.91
  4. Step 4: Simplify right side
    15,175.12x = 237,987,936.13
  5. Step 5: Solve for x
    x = 237,987,936.13/15,175.12
  6. Step 6: Final answer
    x = 15,682.77

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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.