Home / 13,990.45-19,310.12-8,689.27

Finding the Fourth Proportional to 13,990.45, 19,310.12 and 8,689.27

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Solution

The fourth proportional to 13,990.45, 19,310.12 and 8,689.27 is: 11,993.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,990.45 : 19,310.12 = 8,689.27 : x
  2. Step 2: Convert to fraction form
    13,990.45/19,310.12 = 8,689.27/x
  3. Step 3: Cross multiply
    13,990.45x = 19,310.12 × 8,689.27
  4. Step 4: Simplify right side
    13,990.45x = 167,790,846.41
  5. Step 5: Solve for x
    x = 167,790,846.41/13,990.45
  6. Step 6: Final answer
    x = 11,993.24

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Half scale
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Double scale
Find fourth proportional to 13,991.45, 19,311.50 and 8,690.27
Similar ratio
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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.