Home / 20,768.40-31,132.35-11,874.60

Finding the Fourth Proportional to 20,768.40, 31,132.35 and 11,874.60

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Solution

The fourth proportional to 20,768.40, 31,132.35 and 11,874.60 is: 17,800.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,768.40 : 31,132.35 = 11,874.60 : x
  2. Step 2: Convert to fraction form
    20,768.40/31,132.35 = 11,874.60/x
  3. Step 3: Cross multiply
    20,768.40x = 31,132.35 × 11,874.60
  4. Step 4: Simplify right side
    20,768.40x = 369,684,203.31
  5. Step 5: Solve for x
    x = 369,684,203.31/20,768.40
  6. Step 6: Final answer
    x = 17,800.32

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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.