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Finding the Fourth Proportional to 28,219.92, 38,944.42 and 15,474.12

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Solution

The fourth proportional to 28,219.92, 38,944.42 and 15,474.12 is: 21,354.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,219.92 : 38,944.42 = 15,474.12 : x
  2. Step 2: Convert to fraction form
    28,219.92/38,944.42 = 15,474.12/x
  3. Step 3: Cross multiply
    28,219.92x = 38,944.42 × 15,474.12
  4. Step 4: Simplify right side
    28,219.92x = 602,630,628.41
  5. Step 5: Solve for x
    x = 602,630,628.41/28,219.92
  6. Step 6: Final answer
    x = 21,354.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.