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Finding the Fourth Proportional to 18,947.28, 28,420.90 and 5,096.28

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Solution

The fourth proportional to 18,947.28, 28,420.90 and 5,096.28 is: 7,644.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,947.28 : 28,420.90 = 5,096.28 : x
  2. Step 2: Convert to fraction form
    18,947.28/28,420.90 = 5,096.28/x
  3. Step 3: Cross multiply
    18,947.28x = 28,420.90 × 5,096.28
  4. Step 4: Simplify right side
    18,947.28x = 144,840,864.25
  5. Step 5: Solve for x
    x = 144,840,864.25/18,947.28
  6. Step 6: Final answer
    x = 7,644.41

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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.