Home / 12,077.78-18,118.80-4,286.60

Finding the Fourth Proportional to 12,077.78, 18,118.80 and 4,286.60

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Solution

The fourth proportional to 12,077.78, 18,118.80 and 4,286.60 is: 6,430.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,077.78 : 18,118.80 = 4,286.60 : x
  2. Step 2: Convert to fraction form
    12,077.78/18,118.80 = 4,286.60/x
  3. Step 3: Cross multiply
    12,077.78x = 18,118.80 × 4,286.60
  4. Step 4: Simplify right side
    12,077.78x = 77,668,048.08
  5. Step 5: Solve for x
    x = 77,668,048.08/12,077.78
  6. Step 6: Final answer
    x = 6,430.66

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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.