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Finding the Fourth Proportional to 20,090.88, 30,136.08 and 9,695.28

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Solution

The fourth proportional to 20,090.88, 30,136.08 and 9,695.28 is: 14,542.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,090.88 : 30,136.08 = 9,695.28 : x
  2. Step 2: Convert to fraction form
    20,090.88/30,136.08 = 9,695.28/x
  3. Step 3: Cross multiply
    20,090.88x = 30,136.08 × 9,695.28
  4. Step 4: Simplify right side
    20,090.88x = 292,177,733.70
  5. Step 5: Solve for x
    x = 292,177,733.70/20,090.88
  6. Step 6: Final answer
    x = 14,542.80

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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.