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Finding the Fourth Proportional to 28,652.88, 42,979.62 and 8,662.55

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Solution

The fourth proportional to 28,652.88, 42,979.62 and 8,662.55 is: 12,993.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,652.88 : 42,979.62 = 8,662.55 : x
  2. Step 2: Convert to fraction form
    28,652.88/42,979.62 = 8,662.55/x
  3. Step 3: Cross multiply
    28,652.88x = 42,979.62 × 8,662.55
  4. Step 4: Simplify right side
    28,652.88x = 372,312,892.33
  5. Step 5: Solve for x
    x = 372,312,892.33/28,652.88
  6. Step 6: Final answer
    x = 12,993.91

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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.