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Finding the Fourth Proportional to 35,456.70, 48,916.53 and 20,343.90

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Solution

The fourth proportional to 35,456.70, 48,916.53 and 20,343.90 is: 28,066.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,456.70 : 48,916.53 = 20,343.90 : x
  2. Step 2: Convert to fraction form
    35,456.70/48,916.53 = 20,343.90/x
  3. Step 3: Cross multiply
    35,456.70x = 48,916.53 × 20,343.90
  4. Step 4: Simplify right side
    35,456.70x = 995,152,994.67
  5. Step 5: Solve for x
    x = 995,152,994.67/35,456.70
  6. Step 6: Final answer
    x = 28,066.71

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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.