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Finding the Fourth Proportional to 20,113.80, 30,134.70 and 9,702.60

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Solution

The fourth proportional to 20,113.80, 30,134.70 and 9,702.60 is: 14,536.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,113.80 : 30,134.70 = 9,702.60 : x
  2. Step 2: Convert to fraction form
    20,113.80/30,134.70 = 9,702.60/x
  3. Step 3: Cross multiply
    20,113.80x = 30,134.70 × 9,702.60
  4. Step 4: Simplify right side
    20,113.80x = 292,384,940.22
  5. Step 5: Solve for x
    x = 292,384,940.22/20,113.80
  6. Step 6: Final answer
    x = 14,536.53

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1.5x scale

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.