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Finding the Fourth Proportional to 20,271.36, 30,411.36 and 6,420.48

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Solution

The fourth proportional to 20,271.36, 30,411.36 and 6,420.48 is: 9,632.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,271.36 : 30,411.36 = 6,420.48 : x
  2. Step 2: Convert to fraction form
    20,271.36/30,411.36 = 6,420.48/x
  3. Step 3: Cross multiply
    20,271.36x = 30,411.36 × 6,420.48
  4. Step 4: Simplify right side
    20,271.36x = 195,255,528.65
  5. Step 5: Solve for x
    x = 195,255,528.65/20,271.36
  6. Step 6: Final answer
    x = 9,632.09

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.