Home / 21,032.40-31,493.88-20,409.09

Finding the Fourth Proportional to 21,032.40, 31,493.88 and 20,409.09

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Solution

The fourth proportional to 21,032.40, 31,493.88 and 20,409.09 is: 30,560.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,032.40 : 31,493.88 = 20,409.09 : x
  2. Step 2: Convert to fraction form
    21,032.40/31,493.88 = 20,409.09/x
  3. Step 3: Cross multiply
    21,032.40x = 31,493.88 × 20,409.09
  4. Step 4: Simplify right side
    21,032.40x = 642,761,431.37
  5. Step 5: Solve for x
    x = 642,761,431.37/21,032.40
  6. Step 6: Final answer
    x = 30,560.54

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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.