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Finding the Fourth Proportional to 8,681.76, 11,981.28 and 4,906.24

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Solution

The fourth proportional to 8,681.76, 11,981.28 and 4,906.24 is: 6,770.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,681.76 : 11,981.28 = 4,906.24 : x
  2. Step 2: Convert to fraction form
    8,681.76/11,981.28 = 4,906.24/x
  3. Step 3: Cross multiply
    8,681.76x = 11,981.28 × 4,906.24
  4. Step 4: Simplify right side
    8,681.76x = 58,783,035.19
  5. Step 5: Solve for x
    x = 58,783,035.19/8,681.76
  6. Step 6: Final answer
    x = 6,770.87

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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.