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Finding the Fourth Proportional to 20,608.40, 30,869.40 and 17,152.40

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Solution

The fourth proportional to 20,608.40, 30,869.40 and 17,152.40 is: 25,692.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,608.40 : 30,869.40 = 17,152.40 : x
  2. Step 2: Convert to fraction form
    20,608.40/30,869.40 = 17,152.40/x
  3. Step 3: Cross multiply
    20,608.40x = 30,869.40 × 17,152.40
  4. Step 4: Simplify right side
    20,608.40x = 529,484,296.56
  5. Step 5: Solve for x
    x = 529,484,296.56/20,608.40
  6. Step 6: Final answer
    x = 25,692.64

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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.