Home / 12,090.70-16,685.34-6,640.22

Finding the Fourth Proportional to 12,090.70, 16,685.34 and 6,640.22

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Solution

The fourth proportional to 12,090.70, 16,685.34 and 6,640.22 is: 9,163.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,090.70 : 16,685.34 = 6,640.22 : x
  2. Step 2: Convert to fraction form
    12,090.70/16,685.34 = 6,640.22/x
  3. Step 3: Cross multiply
    12,090.70x = 16,685.34 × 6,640.22
  4. Step 4: Simplify right side
    12,090.70x = 110,794,307.52
  5. Step 5: Solve for x
    x = 110,794,307.52/12,090.70
  6. Step 6: Final answer
    x = 9,163.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.