Home / 12,287.39-18,420.17-4,789.22

Finding the Fourth Proportional to 12,287.39, 18,420.17 and 4,789.22

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Solution

The fourth proportional to 12,287.39, 18,420.17 and 4,789.22 is: 7,179.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,287.39 : 18,420.17 = 4,789.22 : x
  2. Step 2: Convert to fraction form
    12,287.39/18,420.17 = 4,789.22/x
  3. Step 3: Cross multiply
    12,287.39x = 18,420.17 × 4,789.22
  4. Step 4: Simplify right side
    12,287.39x = 88,218,130.52
  5. Step 5: Solve for x
    x = 88,218,130.52/12,287.39
  6. Step 6: Final answer
    x = 7,179.57

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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.