Home / 20,851.26-28,775.43-11,420.34

Finding the Fourth Proportional to 20,851.26, 28,775.43 and 11,420.34

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Solution

The fourth proportional to 20,851.26, 28,775.43 and 11,420.34 is: 15,760.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,851.26 : 28,775.43 = 11,420.34 : x
  2. Step 2: Convert to fraction form
    20,851.26/28,775.43 = 11,420.34/x
  3. Step 3: Cross multiply
    20,851.26x = 28,775.43 × 11,420.34
  4. Step 4: Simplify right side
    20,851.26x = 328,625,194.25
  5. Step 5: Solve for x
    x = 328,625,194.25/20,851.26
  6. Step 6: Final answer
    x = 15,760.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.