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Finding the Fourth Proportional to 20,937.78, 28,894.03 and 11,377.60

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Solution

The fourth proportional to 20,937.78, 28,894.03 and 11,377.60 is: 15,701.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,937.78 : 28,894.03 = 11,377.60 : x
  2. Step 2: Convert to fraction form
    20,937.78/28,894.03 = 11,377.60/x
  3. Step 3: Cross multiply
    20,937.78x = 28,894.03 × 11,377.60
  4. Step 4: Simplify right side
    20,937.78x = 328,744,615.05
  5. Step 5: Solve for x
    x = 328,744,615.05/20,937.78
  6. Step 6: Final answer
    x = 15,701.03

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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.