Home / 13,221.89-18,247.36-7,254.72

Finding the Fourth Proportional to 13,221.89, 18,247.36 and 7,254.72

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Solution

The fourth proportional to 13,221.89, 18,247.36 and 7,254.72 is: 10,012.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,221.89 : 18,247.36 = 7,254.72 : x
  2. Step 2: Convert to fraction form
    13,221.89/18,247.36 = 7,254.72/x
  3. Step 3: Cross multiply
    13,221.89x = 18,247.36 × 7,254.72
  4. Step 4: Simplify right side
    13,221.89x = 132,379,515.02
  5. Step 5: Solve for x
    x = 132,379,515.02/13,221.89
  6. Step 6: Final answer
    x = 10,012.15

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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.