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Finding the Fourth Proportional to 8,685.61, 11,985.18 and 4,908.77

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Solution

The fourth proportional to 8,685.61, 11,985.18 and 4,908.77 is: 6,773.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,685.61 : 11,985.18 = 4,908.77 : x
  2. Step 2: Convert to fraction form
    8,685.61/11,985.18 = 4,908.77/x
  3. Step 3: Cross multiply
    8,685.61x = 11,985.18 × 4,908.77
  4. Step 4: Simplify right side
    8,685.61x = 58,832,540.40
  5. Step 5: Solve for x
    x = 58,832,540.40/8,685.61
  6. Step 6: Final answer
    x = 6,773.56

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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.