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Finding the Fourth Proportional to 13,898.10, 20,808.81 and 7,310.10

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Solution

The fourth proportional to 13,898.10, 20,808.81 and 7,310.10 is: 10,944.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,898.10 : 20,808.81 = 7,310.10 : x
  2. Step 2: Convert to fraction form
    13,898.10/20,808.81 = 7,310.10/x
  3. Step 3: Cross multiply
    13,898.10x = 20,808.81 × 7,310.10
  4. Step 4: Simplify right side
    13,898.10x = 152,114,481.98
  5. Step 5: Solve for x
    x = 152,114,481.98/13,898.10
  6. Step 6: Final answer
    x = 10,944.98

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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.