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Finding the Fourth Proportional to 35,493.97, 48,981.72 and 20,389.55

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Solution

The fourth proportional to 35,493.97, 48,981.72 and 20,389.55 is: 28,137.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,493.97 : 48,981.72 = 20,389.55 : x
  2. Step 2: Convert to fraction form
    35,493.97/48,981.72 = 20,389.55/x
  3. Step 3: Cross multiply
    35,493.97x = 48,981.72 × 20,389.55
  4. Step 4: Simplify right side
    35,493.97x = 998,715,127.08
  5. Step 5: Solve for x
    x = 998,715,127.08/35,493.97
  6. Step 6: Final answer
    x = 28,137.60

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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.