Home / 12,078.39-18,119.13-4,287.27

Finding the Fourth Proportional to 12,078.39, 18,119.13 and 4,287.27

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Solution

The fourth proportional to 12,078.39, 18,119.13 and 4,287.27 is: 6,431.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,078.39 : 18,119.13 = 4,287.27 : x
  2. Step 2: Convert to fraction form
    12,078.39/18,119.13 = 4,287.27/x
  3. Step 3: Cross multiply
    12,078.39x = 18,119.13 × 4,287.27
  4. Step 4: Simplify right side
    12,078.39x = 77,681,602.48
  5. Step 5: Solve for x
    x = 77,681,602.48/12,078.39
  6. Step 6: Final answer
    x = 6,431.45

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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.