Home / 20,822.02-28,733.78-11,390.38

Finding the Fourth Proportional to 20,822.02, 28,733.78 and 11,390.38

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Solution

The fourth proportional to 20,822.02, 28,733.78 and 11,390.38 is: 15,718.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,822.02 : 28,733.78 = 11,390.38 : x
  2. Step 2: Convert to fraction form
    20,822.02/28,733.78 = 11,390.38/x
  3. Step 3: Cross multiply
    20,822.02x = 28,733.78 × 11,390.38
  4. Step 4: Simplify right side
    20,822.02x = 327,288,673.04
  5. Step 5: Solve for x
    x = 327,288,673.04/20,822.02
  6. Step 6: Final answer
    x = 15,718.39

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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.