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Finding the Fourth Proportional to 34,553.40, 47,684.21 and 20,406.21

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Solution

The fourth proportional to 34,553.40, 47,684.21 and 20,406.21 is: 28,160.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,553.40 : 47,684.21 = 20,406.21 : x
  2. Step 2: Convert to fraction form
    34,553.40/47,684.21 = 20,406.21/x
  3. Step 3: Cross multiply
    34,553.40x = 47,684.21 × 20,406.21
  4. Step 4: Simplify right side
    34,553.40x = 973,053,900.91
  5. Step 5: Solve for x
    x = 973,053,900.91/34,553.40
  6. Step 6: Final answer
    x = 28,160.87

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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.