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Finding the Fourth Proportional to 8,686.08, 11,988 and 6,454.80

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Solution

The fourth proportional to 8,686.08, 11,988 and 6,454.80 is: 8,908.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,686.08 : 11,988 = 6,454.80 : x
  2. Step 2: Convert to fraction form
    8,686.08/11,988 = 6,454.80/x
  3. Step 3: Cross multiply
    8,686.08x = 11,988 × 6,454.80
  4. Step 4: Simplify right side
    8,686.08x = 77,380,142.40
  5. Step 5: Solve for x
    x = 77,380,142.40/8,686.08
  6. Step 6: Final answer
    x = 8,908.52

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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.