Home / 7,120.43-10,681.86-2,189.96

Finding the Fourth Proportional to 7,120.43, 10,681.86 and 2,189.96

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Solution

The fourth proportional to 7,120.43, 10,681.86 and 2,189.96 is: 3,285.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,120.43 : 10,681.86 = 2,189.96 : x
  2. Step 2: Convert to fraction form
    7,120.43/10,681.86 = 2,189.96/x
  3. Step 3: Cross multiply
    7,120.43x = 10,681.86 × 2,189.96
  4. Step 4: Simplify right side
    7,120.43x = 23,392,781.77
  5. Step 5: Solve for x
    x = 23,392,781.77/7,120.43
  6. Step 6: Final answer
    x = 3,285.31

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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.