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Finding the Fourth Proportional to 9,578.79, 13,230.54 and 6,921.99

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Solution

The fourth proportional to 9,578.79, 13,230.54 and 6,921.99 is: 9,560.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,578.79 : 13,230.54 = 6,921.99 : x
  2. Step 2: Convert to fraction form
    9,578.79/13,230.54 = 6,921.99/x
  3. Step 3: Cross multiply
    9,578.79x = 13,230.54 × 6,921.99
  4. Step 4: Simplify right side
    9,578.79x = 91,581,665.57
  5. Step 5: Solve for x
    x = 91,581,665.57/9,578.79
  6. Step 6: Final answer
    x = 9,560.88

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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.