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Finding the Fourth Proportional to 9,179.81, 12,657.04 and 7,760.99

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Solution

The fourth proportional to 9,179.81, 12,657.04 and 7,760.99 is: 10,700.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,179.81 : 12,657.04 = 7,760.99 : x
  2. Step 2: Convert to fraction form
    9,179.81/12,657.04 = 7,760.99/x
  3. Step 3: Cross multiply
    9,179.81x = 12,657.04 × 7,760.99
  4. Step 4: Simplify right side
    9,179.81x = 98,231,173.11
  5. Step 5: Solve for x
    x = 98,231,173.11/9,179.81
  6. Step 6: Final answer
    x = 10,700.79

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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.