Home / 20,938.82-28,895.21-11,378.86

Finding the Fourth Proportional to 20,938.82, 28,895.21 and 11,378.86

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Solution

The fourth proportional to 20,938.82, 28,895.21 and 11,378.86 is: 15,702.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,938.82 : 28,895.21 = 11,378.86 : x
  2. Step 2: Convert to fraction form
    20,938.82/28,895.21 = 11,378.86/x
  3. Step 3: Cross multiply
    20,938.82x = 28,895.21 × 11,378.86
  4. Step 4: Simplify right side
    20,938.82x = 328,794,462.80
  5. Step 5: Solve for x
    x = 328,794,462.80/20,938.82
  6. Step 6: Final answer
    x = 15,702.63

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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.