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Finding the Fourth Proportional to 28,910.76, 43,369.04 and 7,851.12

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Solution

The fourth proportional to 28,910.76, 43,369.04 and 7,851.12 is: 11,777.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,910.76 : 43,369.04 = 7,851.12 : x
  2. Step 2: Convert to fraction form
    28,910.76/43,369.04 = 7,851.12/x
  3. Step 3: Cross multiply
    28,910.76x = 43,369.04 × 7,851.12
  4. Step 4: Simplify right side
    28,910.76x = 340,495,537.32
  5. Step 5: Solve for x
    x = 340,495,537.32/28,910.76
  6. Step 6: Final answer
    x = 11,777.47

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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.