Home / 20,810.22-28,717.92-11,378.85

Finding the Fourth Proportional to 20,810.22, 28,717.92 and 11,378.85

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Solution

The fourth proportional to 20,810.22, 28,717.92 and 11,378.85 is: 15,702.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,810.22 : 28,717.92 = 11,378.85 : x
  2. Step 2: Convert to fraction form
    20,810.22/28,717.92 = 11,378.85/x
  3. Step 3: Cross multiply
    20,810.22x = 28,717.92 × 11,378.85
  4. Step 4: Simplify right side
    20,810.22x = 326,776,903.99
  5. Step 5: Solve for x
    x = 326,776,903.99/20,810.22
  6. Step 6: Final answer
    x = 15,702.71

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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.