Home / 20,774.49-31,147.56-11,899.86

Finding the Fourth Proportional to 20,774.49, 31,147.56 and 11,899.86

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Solution

The fourth proportional to 20,774.49, 31,147.56 and 11,899.86 is: 17,841.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,774.49 : 31,147.56 = 11,899.86 : x
  2. Step 2: Convert to fraction form
    20,774.49/31,147.56 = 11,899.86/x
  3. Step 3: Cross multiply
    20,774.49x = 31,147.56 × 11,899.86
  4. Step 4: Simplify right side
    20,774.49x = 370,651,603.34
  5. Step 5: Solve for x
    x = 370,651,603.34/20,774.49
  6. Step 6: Final answer
    x = 17,841.67

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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.