Home / 28,218.42-42,244.54-20,855.70

Finding the Fourth Proportional to 28,218.42, 42,244.54 and 20,855.70

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Solution

The fourth proportional to 28,218.42, 42,244.54 and 20,855.70 is: 31,222.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,218.42 : 42,244.54 = 20,855.70 : x
  2. Step 2: Convert to fraction form
    28,218.42/42,244.54 = 20,855.70/x
  3. Step 3: Cross multiply
    28,218.42x = 42,244.54 × 20,855.70
  4. Step 4: Simplify right side
    28,218.42x = 881,039,452.88
  5. Step 5: Solve for x
    x = 881,039,452.88/28,218.42
  6. Step 6: Final answer
    x = 31,222.14

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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.