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Finding the Fourth Proportional to 6,659.38, 9,985.98 and 3,886.85

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Solution

The fourth proportional to 6,659.38, 9,985.98 and 3,886.85 is: 5,828.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,659.38 : 9,985.98 = 3,886.85 : x
  2. Step 2: Convert to fraction form
    6,659.38/9,985.98 = 3,886.85/x
  3. Step 3: Cross multiply
    6,659.38x = 9,985.98 × 3,886.85
  4. Step 4: Simplify right side
    6,659.38x = 38,814,006.36
  5. Step 5: Solve for x
    x = 38,814,006.36/6,659.38
  6. Step 6: Final answer
    x = 5,828.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.