Home / 20,518.62-30,774.09-12,775.26

Finding the Fourth Proportional to 20,518.62, 30,774.09 and 12,775.26

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Solution

The fourth proportional to 20,518.62, 30,774.09 and 12,775.26 is: 19,160.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,518.62 : 30,774.09 = 12,775.26 : x
  2. Step 2: Convert to fraction form
    20,518.62/30,774.09 = 12,775.26/x
  3. Step 3: Cross multiply
    20,518.62x = 30,774.09 × 12,775.26
  4. Step 4: Simplify right side
    20,518.62x = 393,147,001.01
  5. Step 5: Solve for x
    x = 393,147,001.01/20,518.62
  6. Step 6: Final answer
    x = 19,160.50

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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.