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Finding the Fourth Proportional to 13,474.10, 20,211.15 and 10,666.10

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Solution

The fourth proportional to 13,474.10, 20,211.15 and 10,666.10 is: 15,999.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,474.10 : 20,211.15 = 10,666.10 : x
  2. Step 2: Convert to fraction form
    13,474.10/20,211.15 = 10,666.10/x
  3. Step 3: Cross multiply
    13,474.10x = 20,211.15 × 10,666.10
  4. Step 4: Simplify right side
    13,474.10x = 215,574,147.02
  5. Step 5: Solve for x
    x = 215,574,147.02/13,474.10
  6. Step 6: Final answer
    x = 15,999.15

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Similar ratio
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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.