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Finding the Fourth Proportional to 9,315.54, 12,855.49 and 5,066.62

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Solution

The fourth proportional to 9,315.54, 12,855.49 and 5,066.62 is: 6,991.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,315.54 : 12,855.49 = 5,066.62 : x
  2. Step 2: Convert to fraction form
    9,315.54/12,855.49 = 5,066.62/x
  3. Step 3: Cross multiply
    9,315.54x = 12,855.49 × 5,066.62
  4. Step 4: Simplify right side
    9,315.54x = 65,133,837.94
  5. Step 5: Solve for x
    x = 65,133,837.94/9,315.54
  6. Step 6: Final answer
    x = 6,991.96

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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.