Home / 11,690.40-17,516.16-8,220.36

Finding the Fourth Proportional to 11,690.40, 17,516.16 and 8,220.36

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Solution

The fourth proportional to 11,690.40, 17,516.16 and 8,220.36 is: 12,316.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,690.40 : 17,516.16 = 8,220.36 : x
  2. Step 2: Convert to fraction form
    11,690.40/17,516.16 = 8,220.36/x
  3. Step 3: Cross multiply
    11,690.40x = 17,516.16 × 8,220.36
  4. Step 4: Simplify right side
    11,690.40x = 143,989,141.02
  5. Step 5: Solve for x
    x = 143,989,141.02/11,690.40
  6. Step 6: Final answer
    x = 12,316.87

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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.