Home / 20,920.08-28,869.71-11,359.92

Finding the Fourth Proportional to 20,920.08, 28,869.71 and 11,359.92

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Solution

The fourth proportional to 20,920.08, 28,869.71 and 11,359.92 is: 15,676.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,920.08 : 28,869.71 = 11,359.92 : x
  2. Step 2: Convert to fraction form
    20,920.08/28,869.71 = 11,359.92/x
  3. Step 3: Cross multiply
    20,920.08x = 28,869.71 × 11,359.92
  4. Step 4: Simplify right side
    20,920.08x = 327,957,596.02
  5. Step 5: Solve for x
    x = 327,957,596.02/20,920.08
  6. Step 6: Final answer
    x = 15,676.69

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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.