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Finding the Fourth Proportional to 9,318.60, 12,859.80 and 5,069.79

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Solution

The fourth proportional to 9,318.60, 12,859.80 and 5,069.79 is: 6,996.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,318.60 : 12,859.80 = 5,069.79 : x
  2. Step 2: Convert to fraction form
    9,318.60/12,859.80 = 5,069.79/x
  3. Step 3: Cross multiply
    9,318.60x = 12,859.80 × 5,069.79
  4. Step 4: Simplify right side
    9,318.60x = 65,196,485.44
  5. Step 5: Solve for x
    x = 65,196,485.44/9,318.60
  6. Step 6: Final answer
    x = 6,996.38

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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.