Home / 15,342.20-21,171.76-8,628.12

Finding the Fourth Proportional to 15,342.20, 21,171.76 and 8,628.12

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Solution

The fourth proportional to 15,342.20, 21,171.76 and 8,628.12 is: 11,906.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,342.20 : 21,171.76 = 8,628.12 : x
  2. Step 2: Convert to fraction form
    15,342.20/21,171.76 = 8,628.12/x
  3. Step 3: Cross multiply
    15,342.20x = 21,171.76 × 8,628.12
  4. Step 4: Simplify right side
    15,342.20x = 182,672,485.89
  5. Step 5: Solve for x
    x = 182,672,485.89/15,342.20
  6. Step 6: Final answer
    x = 11,906.54

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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.