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Finding the Fourth Proportional to 35,493.60, 48,981.22 and 20,389.20

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Solution

The fourth proportional to 35,493.60, 48,981.22 and 20,389.20 is: 28,137.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,493.60 : 48,981.22 = 20,389.20 : x
  2. Step 2: Convert to fraction form
    35,493.60/48,981.22 = 20,389.20/x
  3. Step 3: Cross multiply
    35,493.60x = 48,981.22 × 20,389.20
  4. Step 4: Simplify right side
    35,493.60x = 998,687,656.17
  5. Step 5: Solve for x
    x = 998,687,656.17/35,493.60
  6. Step 6: Final answer
    x = 28,137.12

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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.