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Finding the Fourth Proportional to 21,865.28, 30,173.74 and 12,433.64

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Solution

The fourth proportional to 21,865.28, 30,173.74 and 12,433.64 is: 17,158.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,865.28 : 30,173.74 = 12,433.64 : x
  2. Step 2: Convert to fraction form
    21,865.28/30,173.74 = 12,433.64/x
  3. Step 3: Cross multiply
    21,865.28x = 30,173.74 × 12,433.64
  4. Step 4: Simplify right side
    21,865.28x = 375,169,420.61
  5. Step 5: Solve for x
    x = 375,169,420.61/21,865.28
  6. Step 6: Final answer
    x = 17,158.23

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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.