Home / 12,090.71-18,128.57-4,191.36

Finding the Fourth Proportional to 12,090.71, 18,128.57 and 4,191.36

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Solution

The fourth proportional to 12,090.71, 18,128.57 and 4,191.36 is: 6,284.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,090.71 : 18,128.57 = 4,191.36 : x
  2. Step 2: Convert to fraction form
    12,090.71/18,128.57 = 4,191.36/x
  3. Step 3: Cross multiply
    12,090.71x = 18,128.57 × 4,191.36
  4. Step 4: Simplify right side
    12,090.71x = 75,983,342.20
  5. Step 5: Solve for x
    x = 75,983,342.20/12,090.71
  6. Step 6: Final answer
    x = 6,284.44

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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.