Home / 21,141.80-29,086.26-20,558.60

Finding the Fourth Proportional to 21,141.80, 29,086.26 and 20,558.60

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Solution

The fourth proportional to 21,141.80, 29,086.26 and 20,558.60 is: 28,283.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,141.80 : 29,086.26 = 20,558.60 : x
  2. Step 2: Convert to fraction form
    21,141.80/29,086.26 = 20,558.60/x
  3. Step 3: Cross multiply
    21,141.80x = 29,086.26 × 20,558.60
  4. Step 4: Simplify right side
    21,141.80x = 597,972,784.84
  5. Step 5: Solve for x
    x = 597,972,784.84/21,141.80
  6. Step 6: Final answer
    x = 28,283.91

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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.