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Finding the Fourth Proportional to 15,361.20, 23,009.40 and 13,719.60

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Solution

The fourth proportional to 15,361.20, 23,009.40 and 13,719.60 is: 20,550.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,361.20 : 23,009.40 = 13,719.60 : x
  2. Step 2: Convert to fraction form
    15,361.20/23,009.40 = 13,719.60/x
  3. Step 3: Cross multiply
    15,361.20x = 23,009.40 × 13,719.60
  4. Step 4: Simplify right side
    15,361.20x = 315,679,764.24
  5. Step 5: Solve for x
    x = 315,679,764.24/15,361.20
  6. Step 6: Final answer
    x = 20,550.46

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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.