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Finding the Fourth Proportional to 28,309.28, 42,463.76 and 7,249.28

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Solution

The fourth proportional to 28,309.28, 42,463.76 and 7,249.28 is: 10,873.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,309.28 : 42,463.76 = 7,249.28 : x
  2. Step 2: Convert to fraction form
    28,309.28/42,463.76 = 7,249.28/x
  3. Step 3: Cross multiply
    28,309.28x = 42,463.76 × 7,249.28
  4. Step 4: Simplify right side
    28,309.28x = 307,831,478.30
  5. Step 5: Solve for x
    x = 307,831,478.30/28,309.28
  6. Step 6: Final answer
    x = 10,873.87

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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.