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Finding the Fourth Proportional to 35,311.70, 48,734.45 and 20,407.70

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Solution

The fourth proportional to 35,311.70, 48,734.45 and 20,407.70 is: 28,165.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,311.70 : 48,734.45 = 20,407.70 : x
  2. Step 2: Convert to fraction form
    35,311.70/48,734.45 = 20,407.70/x
  3. Step 3: Cross multiply
    35,311.70x = 48,734.45 × 20,407.70
  4. Step 4: Simplify right side
    35,311.70x = 994,557,689.55
  5. Step 5: Solve for x
    x = 994,557,689.55/35,311.70
  6. Step 6: Final answer
    x = 28,165.11

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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.