Home / 15,674.37-21,631-8,600.78

Finding the Fourth Proportional to 15,674.37, 21,631 and 8,600.78

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Solution

The fourth proportional to 15,674.37, 21,631 and 8,600.78 is: 11,869.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,674.37 : 21,631 = 8,600.78 : x
  2. Step 2: Convert to fraction form
    15,674.37/21,631 = 8,600.78/x
  3. Step 3: Cross multiply
    15,674.37x = 21,631 × 8,600.78
  4. Step 4: Simplify right side
    15,674.37x = 186,043,472.18
  5. Step 5: Solve for x
    x = 186,043,472.18/15,674.37
  6. Step 6: Final answer
    x = 11,869.28

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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.