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Finding the Fourth Proportional to 20,140.90, 30,174.90 and 17,224.90

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Solution

The fourth proportional to 20,140.90, 30,174.90 and 17,224.90 is: 25,806.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,140.90 : 30,174.90 = 17,224.90 : x
  2. Step 2: Convert to fraction form
    20,140.90/30,174.90 = 17,224.90/x
  3. Step 3: Cross multiply
    20,140.90x = 30,174.90 × 17,224.90
  4. Step 4: Simplify right side
    20,140.90x = 519,759,635.01
  5. Step 5: Solve for x
    x = 519,759,635.01/20,140.90
  6. Step 6: Final answer
    x = 25,806.18

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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.