Home / 28,216.40-42,286.20-19,998.80

Finding the Fourth Proportional to 28,216.40, 42,286.20 and 19,998.80

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Solution

The fourth proportional to 28,216.40, 42,286.20 and 19,998.80 is: 29,970.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,216.40 : 42,286.20 = 19,998.80 : x
  2. Step 2: Convert to fraction form
    28,216.40/42,286.20 = 19,998.80/x
  3. Step 3: Cross multiply
    28,216.40x = 42,286.20 × 19,998.80
  4. Step 4: Simplify right side
    28,216.40x = 845,673,256.56
  5. Step 5: Solve for x
    x = 845,673,256.56/28,216.40
  6. Step 6: Final answer
    x = 29,970.98

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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.