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Finding the Fourth Proportional to 35,813.70, 53,720.70 and 12,121.43

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Solution

The fourth proportional to 35,813.70, 53,720.70 and 12,121.43 is: 18,182.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,813.70 : 53,720.70 = 12,121.43 : x
  2. Step 2: Convert to fraction form
    35,813.70/53,720.70 = 12,121.43/x
  3. Step 3: Cross multiply
    35,813.70x = 53,720.70 × 12,121.43
  4. Step 4: Simplify right side
    35,813.70x = 651,171,704.60
  5. Step 5: Solve for x
    x = 651,171,704.60/35,813.70
  6. Step 6: Final answer
    x = 18,182.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.