Home / 21,288.36-31,883.30-20,550.24

Finding the Fourth Proportional to 21,288.36, 31,883.30 and 20,550.24

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Solution

The fourth proportional to 21,288.36, 31,883.30 and 20,550.24 is: 30,777.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,288.36 : 31,883.30 = 20,550.24 : x
  2. Step 2: Convert to fraction form
    21,288.36/31,883.30 = 20,550.24/x
  3. Step 3: Cross multiply
    21,288.36x = 31,883.30 × 20,550.24
  4. Step 4: Simplify right side
    21,288.36x = 655,209,466.99
  5. Step 5: Solve for x
    x = 655,209,466.99/21,288.36
  6. Step 6: Final answer
    x = 30,777.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.