Home / 20,822.42-28,734.28-11,390.38

Finding the Fourth Proportional to 20,822.42, 28,734.28 and 11,390.38

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Solution

The fourth proportional to 20,822.42, 28,734.28 and 11,390.38 is: 15,718.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,822.42 : 28,734.28 = 11,390.38 : x
  2. Step 2: Convert to fraction form
    20,822.42/28,734.28 = 11,390.38/x
  3. Step 3: Cross multiply
    20,822.42x = 28,734.28 × 11,390.38
  4. Step 4: Simplify right side
    20,822.42x = 327,294,267.91
  5. Step 5: Solve for x
    x = 327,294,267.91/20,822.42
  6. Step 6: Final answer
    x = 15,718.36

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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.