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Finding the Fourth Proportional to 8,690.87, 11,993.39 and 4,711.95

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Solution

The fourth proportional to 8,690.87, 11,993.39 and 4,711.95 is: 6,502.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,690.87 : 11,993.39 = 4,711.95 : x
  2. Step 2: Convert to fraction form
    8,690.87/11,993.39 = 4,711.95/x
  3. Step 3: Cross multiply
    8,690.87x = 11,993.39 × 4,711.95
  4. Step 4: Simplify right side
    8,690.87x = 56,512,254.01
  5. Step 5: Solve for x
    x = 56,512,254.01/8,690.87
  6. Step 6: Final answer
    x = 6,502.49

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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.