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Finding the Fourth Proportional to 27,878.76, 38,522.54 and 20,737.48

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Solution

The fourth proportional to 27,878.76, 38,522.54 and 20,737.48 is: 28,654.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,878.76 : 38,522.54 = 20,737.48 : x
  2. Step 2: Convert to fraction form
    27,878.76/38,522.54 = 20,737.48/x
  3. Step 3: Cross multiply
    27,878.76x = 38,522.54 × 20,737.48
  4. Step 4: Simplify right side
    27,878.76x = 798,860,402.80
  5. Step 5: Solve for x
    x = 798,860,402.80/27,878.76
  6. Step 6: Final answer
    x = 28,654.80

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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.