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Finding the Fourth Proportional to 8,308.67, 11,477.15 and 7,718.18

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Solution

The fourth proportional to 8,308.67, 11,477.15 and 7,718.18 is: 10,661.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,308.67 : 11,477.15 = 7,718.18 : x
  2. Step 2: Convert to fraction form
    8,308.67/11,477.15 = 7,718.18/x
  3. Step 3: Cross multiply
    8,308.67x = 11,477.15 × 7,718.18
  4. Step 4: Simplify right side
    8,308.67x = 88,582,613.61
  5. Step 5: Solve for x
    x = 88,582,613.61/8,308.67
  6. Step 6: Final answer
    x = 10,661.47

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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.