Home / 8,690.39-13,035.61-2,116.57

Finding the Fourth Proportional to 8,690.39, 13,035.61 and 2,116.57

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Solution

The fourth proportional to 8,690.39, 13,035.61 and 2,116.57 is: 3,174.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,690.39 : 13,035.61 = 2,116.57 : x
  2. Step 2: Convert to fraction form
    8,690.39/13,035.61 = 2,116.57/x
  3. Step 3: Cross multiply
    8,690.39x = 13,035.61 × 2,116.57
  4. Step 4: Simplify right side
    8,690.39x = 27,590,781.06
  5. Step 5: Solve for x
    x = 27,590,781.06/8,690.39
  6. Step 6: Final answer
    x = 3,174.86

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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.