Home / 20,371.86-28,112.63-11,419.94

Finding the Fourth Proportional to 20,371.86, 28,112.63 and 11,419.94

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Solution

The fourth proportional to 20,371.86, 28,112.63 and 11,419.94 is: 15,759.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,371.86 : 28,112.63 = 11,419.94 : x
  2. Step 2: Convert to fraction form
    20,371.86/28,112.63 = 11,419.94/x
  3. Step 3: Cross multiply
    20,371.86x = 28,112.63 × 11,419.94
  4. Step 4: Simplify right side
    20,371.86x = 321,044,547.84
  5. Step 5: Solve for x
    x = 321,044,547.84/20,371.86
  6. Step 6: Final answer
    x = 15,759.22

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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.