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Finding the Fourth Proportional to 20,292.64, 28,003.76 and 11,340.14

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Solution

The fourth proportional to 20,292.64, 28,003.76 and 11,340.14 is: 15,649.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,292.64 : 28,003.76 = 11,340.14 : x
  2. Step 2: Convert to fraction form
    20,292.64/28,003.76 = 11,340.14/x
  3. Step 3: Cross multiply
    20,292.64x = 28,003.76 × 11,340.14
  4. Step 4: Simplify right side
    20,292.64x = 317,566,483.49
  5. Step 5: Solve for x
    x = 317,566,483.49/20,292.64
  6. Step 6: Final answer
    x = 15,649.34

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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.