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Finding the Fourth Proportional to 28,617.78, 42,926.46 and 8,896.30

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Solution

The fourth proportional to 28,617.78, 42,926.46 and 8,896.30 is: 13,344.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,617.78 : 42,926.46 = 8,896.30 : x
  2. Step 2: Convert to fraction form
    28,617.78/42,926.46 = 8,896.30/x
  3. Step 3: Cross multiply
    28,617.78x = 42,926.46 × 8,896.30
  4. Step 4: Simplify right side
    28,617.78x = 381,886,666.10
  5. Step 5: Solve for x
    x = 381,886,666.10/28,617.78
  6. Step 6: Final answer
    x = 13,344.39

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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.