Home / 20,076.75-30,269.18-18,721.65

Finding the Fourth Proportional to 20,076.75, 30,269.18 and 18,721.65

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Solution

The fourth proportional to 20,076.75, 30,269.18 and 18,721.65 is: 28,226.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,076.75 : 30,269.18 = 18,721.65 : x
  2. Step 2: Convert to fraction form
    20,076.75/30,269.18 = 18,721.65/x
  3. Step 3: Cross multiply
    20,076.75x = 30,269.18 × 18,721.65
  4. Step 4: Simplify right side
    20,076.75x = 566,688,900.14
  5. Step 5: Solve for x
    x = 566,688,900.14/20,076.75
  6. Step 6: Final answer
    x = 28,226.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.