Home / 7,120.07-10,681.13-2,190.12

Finding the Fourth Proportional to 7,120.07, 10,681.13 and 2,190.12

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Solution

The fourth proportional to 7,120.07, 10,681.13 and 2,190.12 is: 3,285.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,120.07 : 10,681.13 = 2,190.12 : x
  2. Step 2: Convert to fraction form
    7,120.07/10,681.13 = 2,190.12/x
  3. Step 3: Cross multiply
    7,120.07x = 10,681.13 × 2,190.12
  4. Step 4: Simplify right side
    7,120.07x = 23,392,945.49
  5. Step 5: Solve for x
    x = 23,392,945.49/7,120.07
  6. Step 6: Final answer
    x = 3,285.50

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Half scale
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Double scale
Find fourth proportional to 7,121.07, 10,682.63 and 2,191.12
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.