Home / 7,121.12-10,681.70-1,927.12

Finding the Fourth Proportional to 7,121.12, 10,681.70 and 1,927.12

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Solution

The fourth proportional to 7,121.12, 10,681.70 and 1,927.12 is: 2,890.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,121.12 : 10,681.70 = 1,927.12 : x
  2. Step 2: Convert to fraction form
    7,121.12/10,681.70 = 1,927.12/x
  3. Step 3: Cross multiply
    7,121.12x = 10,681.70 × 1,927.12
  4. Step 4: Simplify right side
    7,121.12x = 20,584,917.70
  5. Step 5: Solve for x
    x = 20,584,917.70/7,121.12
  6. Step 6: Final answer
    x = 2,890.69

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Similar ratio
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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.