Home / 7,120.31-10,681.67-2,189.84

Finding the Fourth Proportional to 7,120.31, 10,681.67 and 2,189.84

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Solution

The fourth proportional to 7,120.31, 10,681.67 and 2,189.84 is: 3,285.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,120.31 : 10,681.67 = 2,189.84 : x
  2. Step 2: Convert to fraction form
    7,120.31/10,681.67 = 2,189.84/x
  3. Step 3: Cross multiply
    7,120.31x = 10,681.67 × 2,189.84
  4. Step 4: Simplify right side
    7,120.31x = 23,391,083.88
  5. Step 5: Solve for x
    x = 23,391,083.88/7,120.31
  6. Step 6: Final answer
    x = 3,285.12

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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.