Home / 13,516.70-18,651.66-8,211.20

Finding the Fourth Proportional to 13,516.70, 18,651.66 and 8,211.20

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Solution

The fourth proportional to 13,516.70, 18,651.66 and 8,211.20 is: 11,330.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,516.70 : 18,651.66 = 8,211.20 : x
  2. Step 2: Convert to fraction form
    13,516.70/18,651.66 = 8,211.20/x
  3. Step 3: Cross multiply
    13,516.70x = 18,651.66 × 8,211.20
  4. Step 4: Simplify right side
    13,516.70x = 153,152,510.59
  5. Step 5: Solve for x
    x = 153,152,510.59/13,516.70
  6. Step 6: Final answer
    x = 11,330.61

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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.