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Finding the Fourth Proportional to 13,640.51, 18,834.50 and 10,651.16

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Solution

The fourth proportional to 13,640.51, 18,834.50 and 10,651.16 is: 14,706.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,640.51 : 18,834.50 = 10,651.16 : x
  2. Step 2: Convert to fraction form
    13,640.51/18,834.50 = 10,651.16/x
  3. Step 3: Cross multiply
    13,640.51x = 18,834.50 × 10,651.16
  4. Step 4: Simplify right side
    13,640.51x = 200,609,273.02
  5. Step 5: Solve for x
    x = 200,609,273.02/13,640.51
  6. Step 6: Final answer
    x = 14,706.87

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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.