Home / 20,987.48-28,960.26-11,912.24

Finding the Fourth Proportional to 20,987.48, 28,960.26 and 11,912.24

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Solution

The fourth proportional to 20,987.48, 28,960.26 and 11,912.24 is: 16,437.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,987.48 : 28,960.26 = 11,912.24 : x
  2. Step 2: Convert to fraction form
    20,987.48/28,960.26 = 11,912.24/x
  3. Step 3: Cross multiply
    20,987.48x = 28,960.26 × 11,912.24
  4. Step 4: Simplify right side
    20,987.48x = 344,981,567.58
  5. Step 5: Solve for x
    x = 344,981,567.58/20,987.48
  6. Step 6: Final answer
    x = 16,437.49

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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.