Home / 8,690.98-11,989.33-5,151.69

Finding the Fourth Proportional to 8,690.98, 11,989.33 and 5,151.69

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Solution

The fourth proportional to 8,690.98, 11,989.33 and 5,151.69 is: 7,106.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,690.98 : 11,989.33 = 5,151.69 : x
  2. Step 2: Convert to fraction form
    8,690.98/11,989.33 = 5,151.69/x
  3. Step 3: Cross multiply
    8,690.98x = 11,989.33 × 5,151.69
  4. Step 4: Simplify right side
    8,690.98x = 61,765,311.47
  5. Step 5: Solve for x
    x = 61,765,311.47/8,690.98
  6. Step 6: Final answer
    x = 7,106.83

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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.