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Finding the Fourth Proportional to 13,608.01, 20,420.19 and 5,816.82

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Solution

The fourth proportional to 13,608.01, 20,420.19 and 5,816.82 is: 8,728.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,608.01 : 20,420.19 = 5,816.82 : x
  2. Step 2: Convert to fraction form
    13,608.01/20,420.19 = 5,816.82/x
  3. Step 3: Cross multiply
    13,608.01x = 20,420.19 × 5,816.82
  4. Step 4: Simplify right side
    13,608.01x = 118,780,569.60
  5. Step 5: Solve for x
    x = 118,780,569.60/13,608.01
  6. Step 6: Final answer
    x = 8,728.72

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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.