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Finding the Fourth Proportional to 28,615.07, 42,929.90 and 8,893.80

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Solution

The fourth proportional to 28,615.07, 42,929.90 and 8,893.80 is: 13,342.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,615.07 : 42,929.90 = 8,893.80 : x
  2. Step 2: Convert to fraction form
    28,615.07/42,929.90 = 8,893.80/x
  3. Step 3: Cross multiply
    28,615.07x = 42,929.90 × 8,893.80
  4. Step 4: Simplify right side
    28,615.07x = 381,809,933.50
  5. Step 5: Solve for x
    x = 381,809,933.50/28,615.07
  6. Step 6: Final answer
    x = 13,342.97

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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.