Home / 15,231.28-21,021.77-8,861.56

Finding the Fourth Proportional to 15,231.28, 21,021.77 and 8,861.56

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Solution

The fourth proportional to 15,231.28, 21,021.77 and 8,861.56 is: 12,230.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,231.28 : 21,021.77 = 8,861.56 : x
  2. Step 2: Convert to fraction form
    15,231.28/21,021.77 = 8,861.56/x
  3. Step 3: Cross multiply
    15,231.28x = 21,021.77 × 8,861.56
  4. Step 4: Simplify right side
    15,231.28x = 186,285,676.16
  5. Step 5: Solve for x
    x = 186,285,676.16/15,231.28
  6. Step 6: Final answer
    x = 12,230.47

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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.