Home / 15,563.82-21,478.68-8,490.54

Finding the Fourth Proportional to 15,563.82, 21,478.68 and 8,490.54

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Solution

The fourth proportional to 15,563.82, 21,478.68 and 8,490.54 is: 11,717.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,563.82 : 21,478.68 = 8,490.54 : x
  2. Step 2: Convert to fraction form
    15,563.82/21,478.68 = 8,490.54/x
  3. Step 3: Cross multiply
    15,563.82x = 21,478.68 × 8,490.54
  4. Step 4: Simplify right side
    15,563.82x = 182,365,591.69
  5. Step 5: Solve for x
    x = 182,365,591.69/15,563.82
  6. Step 6: Final answer
    x = 11,717.28

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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.