Home / 21,441.68-31,868.50-20,859.92

Finding the Fourth Proportional to 21,441.68, 31,868.50 and 20,859.92

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Solution

The fourth proportional to 21,441.68, 31,868.50 and 20,859.92 is: 31,003.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,441.68 : 31,868.50 = 20,859.92 : x
  2. Step 2: Convert to fraction form
    21,441.68/31,868.50 = 20,859.92/x
  3. Step 3: Cross multiply
    21,441.68x = 31,868.50 × 20,859.92
  4. Step 4: Simplify right side
    21,441.68x = 664,774,360.52
  5. Step 5: Solve for x
    x = 664,774,360.52/21,441.68
  6. Step 6: Final answer
    x = 31,003.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.