Home / 13,220.76-18,241.02-8,182.56

Finding the Fourth Proportional to 13,220.76, 18,241.02 and 8,182.56

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Solution

The fourth proportional to 13,220.76, 18,241.02 and 8,182.56 is: 11,289.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,220.76 : 18,241.02 = 8,182.56 : x
  2. Step 2: Convert to fraction form
    13,220.76/18,241.02 = 8,182.56/x
  3. Step 3: Cross multiply
    13,220.76x = 18,241.02 × 8,182.56
  4. Step 4: Simplify right side
    13,220.76x = 149,258,240.61
  5. Step 5: Solve for x
    x = 149,258,240.61/13,220.76
  6. Step 6: Final answer
    x = 11,289.69

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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.