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Finding the Fourth Proportional to 28,475.28, 42,712.92 and 8,485.08

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Solution

The fourth proportional to 28,475.28, 42,712.92 and 8,485.08 is: 12,727.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,475.28 : 42,712.92 = 8,485.08 : x
  2. Step 2: Convert to fraction form
    28,475.28/42,712.92 = 8,485.08/x
  3. Step 3: Cross multiply
    28,475.28x = 42,712.92 × 8,485.08
  4. Step 4: Simplify right side
    28,475.28x = 362,422,383.06
  5. Step 5: Solve for x
    x = 362,422,383.06/28,475.28
  6. Step 6: Final answer
    x = 12,727.61

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Similar ratio
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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.