Home / 21,119.26-31,615.77-12,774.03

Finding the Fourth Proportional to 21,119.26, 31,615.77 and 12,774.03

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Solution

The fourth proportional to 21,119.26, 31,615.77 and 12,774.03 is: 19,122.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,119.26 : 31,615.77 = 12,774.03 : x
  2. Step 2: Convert to fraction form
    21,119.26/31,615.77 = 12,774.03/x
  3. Step 3: Cross multiply
    21,119.26x = 31,615.77 × 12,774.03
  4. Step 4: Simplify right side
    21,119.26x = 403,860,794.45
  5. Step 5: Solve for x
    x = 403,860,794.45/21,119.26
  6. Step 6: Final answer
    x = 19,122.87

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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.