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Finding the Fourth Proportional to 19,090.76, 28,636.03 and 7,403.88

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Solution

The fourth proportional to 19,090.76, 28,636.03 and 7,403.88 is: 11,105.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,090.76 : 28,636.03 = 7,403.88 : x
  2. Step 2: Convert to fraction form
    19,090.76/28,636.03 = 7,403.88/x
  3. Step 3: Cross multiply
    19,090.76x = 28,636.03 × 7,403.88
  4. Step 4: Simplify right side
    19,090.76x = 212,017,729.80
  5. Step 5: Solve for x
    x = 212,017,729.80/19,090.76
  6. Step 6: Final answer
    x = 11,105.78

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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.