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Finding the Fourth Proportional to 8,647.84, 11,939.72 and 6,654.88

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Solution

The fourth proportional to 8,647.84, 11,939.72 and 6,654.88 is: 9,188.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,647.84 : 11,939.72 = 6,654.88 : x
  2. Step 2: Convert to fraction form
    8,647.84/11,939.72 = 6,654.88/x
  3. Step 3: Cross multiply
    8,647.84x = 11,939.72 × 6,654.88
  4. Step 4: Simplify right side
    8,647.84x = 79,457,403.83
  5. Step 5: Solve for x
    x = 79,457,403.83/8,647.84
  6. Step 6: Final answer
    x = 9,188.12

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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.