Home / 7,121.32-10,680.36-1,927.60

Finding the Fourth Proportional to 7,121.32, 10,680.36 and 1,927.60

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Solution

The fourth proportional to 7,121.32, 10,680.36 and 1,927.60 is: 2,890.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,121.32 : 10,680.36 = 1,927.60 : x
  2. Step 2: Convert to fraction form
    7,121.32/10,680.36 = 1,927.60/x
  3. Step 3: Cross multiply
    7,121.32x = 10,680.36 × 1,927.60
  4. Step 4: Simplify right side
    7,121.32x = 20,587,461.94
  5. Step 5: Solve for x
    x = 20,587,461.94/7,121.32
  6. Step 6: Final answer
    x = 2,890.96

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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.