Home / 21,360.36-29,263.21-20,561.73

Finding the Fourth Proportional to 21,360.36, 29,263.21 and 20,561.73

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Solution

The fourth proportional to 21,360.36, 29,263.21 and 20,561.73 is: 28,169.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,360.36 : 29,263.21 = 20,561.73 : x
  2. Step 2: Convert to fraction form
    21,360.36/29,263.21 = 20,561.73/x
  3. Step 3: Cross multiply
    21,360.36x = 29,263.21 × 20,561.73
  4. Step 4: Simplify right side
    21,360.36x = 601,702,076.64
  5. Step 5: Solve for x
    x = 601,702,076.64/21,360.36
  6. Step 6: Final answer
    x = 28,169.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.