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Finding the Fourth Proportional to 19,189.62, 28,742.76 and 9,308.13

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Solution

The fourth proportional to 19,189.62, 28,742.76 and 9,308.13 is: 13,941.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,189.62 : 28,742.76 = 9,308.13 : x
  2. Step 2: Convert to fraction form
    19,189.62/28,742.76 = 9,308.13/x
  3. Step 3: Cross multiply
    19,189.62x = 28,742.76 × 9,308.13
  4. Step 4: Simplify right side
    19,189.62x = 267,541,346.64
  5. Step 5: Solve for x
    x = 267,541,346.64/19,189.62
  6. Step 6: Final answer
    x = 13,941.98

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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.