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Finding the Fourth Proportional to 13,895.19, 20,850.93 and 5,136.21

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Solution

The fourth proportional to 13,895.19, 20,850.93 and 5,136.21 is: 7,707.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,895.19 : 20,850.93 = 5,136.21 : x
  2. Step 2: Convert to fraction form
    13,895.19/20,850.93 = 5,136.21/x
  3. Step 3: Cross multiply
    13,895.19x = 20,850.93 × 5,136.21
  4. Step 4: Simplify right side
    13,895.19x = 107,094,755.18
  5. Step 5: Solve for x
    x = 107,094,755.18/13,895.19
  6. Step 6: Final answer
    x = 7,707.33

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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.