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Finding the Fourth Proportional to 28,379.52, 42,576.08 and 8,656.83

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Solution

The fourth proportional to 28,379.52, 42,576.08 and 8,656.83 is: 12,987.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,379.52 : 42,576.08 = 8,656.83 : x
  2. Step 2: Convert to fraction form
    28,379.52/42,576.08 = 8,656.83/x
  3. Step 3: Cross multiply
    28,379.52x = 42,576.08 × 8,656.83
  4. Step 4: Simplify right side
    28,379.52x = 368,573,843.34
  5. Step 5: Solve for x
    x = 368,573,843.34/28,379.52
  6. Step 6: Final answer
    x = 12,987.32

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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.