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Finding the Fourth Proportional to 8,557.64, 11,808.89 and 4,780.61

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Solution

The fourth proportional to 8,557.64, 11,808.89 and 4,780.61 is: 6,596.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,557.64 : 11,808.89 = 4,780.61 : x
  2. Step 2: Convert to fraction form
    8,557.64/11,808.89 = 4,780.61/x
  3. Step 3: Cross multiply
    8,557.64x = 11,808.89 × 4,780.61
  4. Step 4: Simplify right side
    8,557.64x = 56,453,614.68
  5. Step 5: Solve for x
    x = 56,453,614.68/8,557.64
  6. Step 6: Final answer
    x = 6,596.87

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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.