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Finding the Fourth Proportional to 20,347.12, 28,080.03 and 12,388.06

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Solution

The fourth proportional to 20,347.12, 28,080.03 and 12,388.06 is: 17,096.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,347.12 : 28,080.03 = 12,388.06 : x
  2. Step 2: Convert to fraction form
    20,347.12/28,080.03 = 12,388.06/x
  3. Step 3: Cross multiply
    20,347.12x = 28,080.03 × 12,388.06
  4. Step 4: Simplify right side
    20,347.12x = 347,857,096.44
  5. Step 5: Solve for x
    x = 347,857,096.44/20,347.12
  6. Step 6: Final answer
    x = 17,096.13

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.