Home / 20,816.82-28,729.95-11,862.27

Finding the Fourth Proportional to 20,816.82, 28,729.95 and 11,862.27

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Solution

The fourth proportional to 20,816.82, 28,729.95 and 11,862.27 is: 16,371.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,816.82 : 28,729.95 = 11,862.27 : x
  2. Step 2: Convert to fraction form
    20,816.82/28,729.95 = 11,862.27/x
  3. Step 3: Cross multiply
    20,816.82x = 28,729.95 × 11,862.27
  4. Step 4: Simplify right side
    20,816.82x = 340,802,543.71
  5. Step 5: Solve for x
    x = 340,802,543.71/20,816.82
  6. Step 6: Final answer
    x = 16,371.50

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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.