Home / 20,175.18-30,231.14-12,763.99

Finding the Fourth Proportional to 20,175.18, 30,231.14 and 12,763.99

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Solution

The fourth proportional to 20,175.18, 30,231.14 and 12,763.99 is: 19,125.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,175.18 : 30,231.14 = 12,763.99 : x
  2. Step 2: Convert to fraction form
    20,175.18/30,231.14 = 12,763.99/x
  3. Step 3: Cross multiply
    20,175.18x = 30,231.14 × 12,763.99
  4. Step 4: Simplify right side
    20,175.18x = 385,869,968.65
  5. Step 5: Solve for x
    x = 385,869,968.65/20,175.18
  6. Step 6: Final answer
    x = 19,125.97

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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.