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Finding the Fourth Proportional to 8,670.81, 11,965.62 and 4,691.85

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Solution

The fourth proportional to 8,670.81, 11,965.62 and 4,691.85 is: 6,474.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,670.81 : 11,965.62 = 4,691.85 : x
  2. Step 2: Convert to fraction form
    8,670.81/11,965.62 = 4,691.85/x
  3. Step 3: Cross multiply
    8,670.81x = 11,965.62 × 4,691.85
  4. Step 4: Simplify right side
    8,670.81x = 56,140,894.20
  5. Step 5: Solve for x
    x = 56,140,894.20/8,670.81
  6. Step 6: Final answer
    x = 6,474.70

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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.