Home / 20,371.52-28,112.44-11,421.24

Finding the Fourth Proportional to 20,371.52, 28,112.44 and 11,421.24

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Solution

The fourth proportional to 20,371.52, 28,112.44 and 11,421.24 is: 15,761.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,371.52 : 28,112.44 = 11,421.24 : x
  2. Step 2: Convert to fraction form
    20,371.52/28,112.44 = 11,421.24/x
  3. Step 3: Cross multiply
    20,371.52x = 28,112.44 × 11,421.24
  4. Step 4: Simplify right side
    20,371.52x = 321,078,924.23
  5. Step 5: Solve for x
    x = 321,078,924.23/20,371.52
  6. Step 6: Final answer
    x = 15,761.17

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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.