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Finding the Fourth Proportional to 35,493.47, 48,981.02 and 20,389.05

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Solution

The fourth proportional to 35,493.47, 48,981.02 and 20,389.05 is: 28,136.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,493.47 : 48,981.02 = 20,389.05 : x
  2. Step 2: Convert to fraction form
    35,493.47/48,981.02 = 20,389.05/x
  3. Step 3: Cross multiply
    35,493.47x = 48,981.02 × 20,389.05
  4. Step 4: Simplify right side
    35,493.47x = 998,676,516.80
  5. Step 5: Solve for x
    x = 998,676,516.80/35,493.47
  6. Step 6: Final answer
    x = 28,136.91

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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.