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Finding the Fourth Proportional to 13,363.78, 20,052.78 and 7,520.80

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Solution

The fourth proportional to 13,363.78, 20,052.78 and 7,520.80 is: 11,285.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,363.78 : 20,052.78 = 7,520.80 : x
  2. Step 2: Convert to fraction form
    13,363.78/20,052.78 = 7,520.80/x
  3. Step 3: Cross multiply
    13,363.78x = 20,052.78 × 7,520.80
  4. Step 4: Simplify right side
    13,363.78x = 150,812,947.82
  5. Step 5: Solve for x
    x = 150,812,947.82/13,363.78
  6. Step 6: Final answer
    x = 11,285.20

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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.