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Finding the Fourth Proportional to 13,222.63, 18,247.74 and 7,254.55

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Solution

The fourth proportional to 13,222.63, 18,247.74 and 7,254.55 is: 10,011.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,222.63 : 18,247.74 = 7,254.55 : x
  2. Step 2: Convert to fraction form
    13,222.63/18,247.74 = 7,254.55/x
  3. Step 3: Cross multiply
    13,222.63x = 18,247.74 × 7,254.55
  4. Step 4: Simplify right side
    13,222.63x = 132,379,142.22
  5. Step 5: Solve for x
    x = 132,379,142.22/13,222.63
  6. Step 6: Final answer
    x = 10,011.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.