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Finding the Fourth Proportional to 13,700.55, 18,906.69 and 7,732.20

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Solution

The fourth proportional to 13,700.55, 18,906.69 and 7,732.20 is: 10,670.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,700.55 : 18,906.69 = 7,732.20 : x
  2. Step 2: Convert to fraction form
    13,700.55/18,906.69 = 7,732.20/x
  3. Step 3: Cross multiply
    13,700.55x = 18,906.69 × 7,732.20
  4. Step 4: Simplify right side
    13,700.55x = 146,190,308.42
  5. Step 5: Solve for x
    x = 146,190,308.42/13,700.55
  6. Step 6: Final answer
    x = 10,670.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.