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Finding the Fourth Proportional to 28,573.64, 42,863.28 and 9,851.21

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Solution

The fourth proportional to 28,573.64, 42,863.28 and 9,851.21 is: 14,777.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,573.64 : 42,863.28 = 9,851.21 : x
  2. Step 2: Convert to fraction form
    28,573.64/42,863.28 = 9,851.21/x
  3. Step 3: Cross multiply
    28,573.64x = 42,863.28 × 9,851.21
  4. Step 4: Simplify right side
    28,573.64x = 422,255,202.60
  5. Step 5: Solve for x
    x = 422,255,202.60/28,573.64
  6. Step 6: Final answer
    x = 14,777.79

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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.