Home / 20,603.97-28,433.57-11,172.60

Finding the Fourth Proportional to 20,603.97, 28,433.57 and 11,172.60

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Solution

The fourth proportional to 20,603.97, 28,433.57 and 11,172.60 is: 15,418.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,603.97 : 28,433.57 = 11,172.60 : x
  2. Step 2: Convert to fraction form
    20,603.97/28,433.57 = 11,172.60/x
  3. Step 3: Cross multiply
    20,603.97x = 28,433.57 × 11,172.60
  4. Step 4: Simplify right side
    20,603.97x = 317,676,848.32
  5. Step 5: Solve for x
    x = 317,676,848.32/20,603.97
  6. Step 6: Final answer
    x = 15,418.23

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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.