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Finding the Fourth Proportional to 20,143.20, 30,214.80 and 17,896.80

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Solution

The fourth proportional to 20,143.20, 30,214.80 and 17,896.80 is: 26,845.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,143.20 : 30,214.80 = 17,896.80 : x
  2. Step 2: Convert to fraction form
    20,143.20/30,214.80 = 17,896.80/x
  3. Step 3: Cross multiply
    20,143.20x = 30,214.80 × 17,896.80
  4. Step 4: Simplify right side
    20,143.20x = 540,748,232.64
  5. Step 5: Solve for x
    x = 540,748,232.64/20,143.20
  6. Step 6: Final answer
    x = 26,845.20

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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.