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Finding the Fourth Proportional to 28,615.36, 42,929.12 and 8,893.44

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Solution

The fourth proportional to 28,615.36, 42,929.12 and 8,893.44 is: 13,342.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,615.36 : 42,929.12 = 8,893.44 : x
  2. Step 2: Convert to fraction form
    28,615.36/42,929.12 = 8,893.44/x
  3. Step 3: Cross multiply
    28,615.36x = 42,929.12 × 8,893.44
  4. Step 4: Simplify right side
    28,615.36x = 381,787,552.97
  5. Step 5: Solve for x
    x = 381,787,552.97/28,615.36
  6. Step 6: Final answer
    x = 13,342.05

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1.5x scale

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.