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Finding the Fourth Proportional to 9,135.68, 13,716.48 and 8,718.08

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Solution

The fourth proportional to 9,135.68, 13,716.48 and 8,718.08 is: 13,089.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,135.68 : 13,716.48 = 8,718.08 : x
  2. Step 2: Convert to fraction form
    9,135.68/13,716.48 = 8,718.08/x
  3. Step 3: Cross multiply
    9,135.68x = 13,716.48 × 8,718.08
  4. Step 4: Simplify right side
    9,135.68x = 119,581,369.96
  5. Step 5: Solve for x
    x = 119,581,369.96/9,135.68
  6. Step 6: Final answer
    x = 13,089.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.