Home / 18,219.92-25,090.56-15,828.80

Finding the Fourth Proportional to 18,219.92, 25,090.56 and 15,828.80

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Solution

The fourth proportional to 18,219.92, 25,090.56 and 15,828.80 is: 21,797.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,219.92 : 25,090.56 = 15,828.80 : x
  2. Step 2: Convert to fraction form
    18,219.92/25,090.56 = 15,828.80/x
  3. Step 3: Cross multiply
    18,219.92x = 25,090.56 × 15,828.80
  4. Step 4: Simplify right side
    18,219.92x = 397,153,459.50
  5. Step 5: Solve for x
    x = 397,153,459.50/18,219.92
  6. Step 6: Final answer
    x = 21,797.76

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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.