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Finding the Fourth Proportional to 8,690.41, 11,992.71 and 4,711.51

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Solution

The fourth proportional to 8,690.41, 11,992.71 and 4,711.51 is: 6,501.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,690.41 : 11,992.71 = 4,711.51 : x
  2. Step 2: Convert to fraction form
    8,690.41/11,992.71 = 4,711.51/x
  3. Step 3: Cross multiply
    8,690.41x = 11,992.71 × 4,711.51
  4. Step 4: Simplify right side
    8,690.41x = 56,503,773.09
  5. Step 5: Solve for x
    x = 56,503,773.09/8,690.41
  6. Step 6: Final answer
    x = 6,501.85

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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.