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Finding the Fourth Proportional to 8,684.86, 11,985.16 and 4,908.10

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Solution

The fourth proportional to 8,684.86, 11,985.16 and 4,908.10 is: 6,773.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,684.86 : 11,985.16 = 4,908.10 : x
  2. Step 2: Convert to fraction form
    8,684.86/11,985.16 = 4,908.10/x
  3. Step 3: Cross multiply
    8,684.86x = 11,985.16 × 4,908.10
  4. Step 4: Simplify right side
    8,684.86x = 58,824,363.80
  5. Step 5: Solve for x
    x = 58,824,363.80/8,684.86
  6. Step 6: Final answer
    x = 6,773.21

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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.