Home / 21,121.32-31,680.75-6,330.60

Finding the Fourth Proportional to 21,121.32, 31,680.75 and 6,330.60

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Solution

The fourth proportional to 21,121.32, 31,680.75 and 6,330.60 is: 9,495.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,121.32 : 31,680.75 = 6,330.60 : x
  2. Step 2: Convert to fraction form
    21,121.32/31,680.75 = 6,330.60/x
  3. Step 3: Cross multiply
    21,121.32x = 31,680.75 × 6,330.60
  4. Step 4: Simplify right side
    21,121.32x = 200,558,155.95
  5. Step 5: Solve for x
    x = 200,558,155.95/21,121.32
  6. Step 6: Final answer
    x = 9,495.53

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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.