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Finding the Fourth Proportional to 13,752.47, 20,611.39 and 7,499.47

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Solution

The fourth proportional to 13,752.47, 20,611.39 and 7,499.47 is: 11,239.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,752.47 : 20,611.39 = 7,499.47 : x
  2. Step 2: Convert to fraction form
    13,752.47/20,611.39 = 7,499.47/x
  3. Step 3: Cross multiply
    13,752.47x = 20,611.39 × 7,499.47
  4. Step 4: Simplify right side
    13,752.47x = 154,574,500.96
  5. Step 5: Solve for x
    x = 154,574,500.96/13,752.47
  6. Step 6: Final answer
    x = 11,239.76

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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.