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Finding the Fourth Proportional to 20,937.96, 28,894.50 and 11,377.92

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Solution

The fourth proportional to 20,937.96, 28,894.50 and 11,377.92 is: 15,701.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,937.96 : 28,894.50 = 11,377.92 : x
  2. Step 2: Convert to fraction form
    20,937.96/28,894.50 = 11,377.92/x
  3. Step 3: Cross multiply
    20,937.96x = 28,894.50 × 11,377.92
  4. Step 4: Simplify right side
    20,937.96x = 328,759,309.44
  5. Step 5: Solve for x
    x = 328,759,309.44/20,937.96
  6. Step 6: Final answer
    x = 15,701.59

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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.