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Finding the Fourth Proportional to 28,630.72, 42,954.96 and 8,912.08

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Solution

The fourth proportional to 28,630.72, 42,954.96 and 8,912.08 is: 13,370.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,630.72 : 42,954.96 = 8,912.08 : x
  2. Step 2: Convert to fraction form
    28,630.72/42,954.96 = 8,912.08/x
  3. Step 3: Cross multiply
    28,630.72x = 42,954.96 × 8,912.08
  4. Step 4: Simplify right side
    28,630.72x = 382,818,039.92
  5. Step 5: Solve for x
    x = 382,818,039.92/28,630.72
  6. Step 6: Final answer
    x = 13,370.88

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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.