Home / 12,078.48-18,116.76-4,286.28

Finding the Fourth Proportional to 12,078.48, 18,116.76 and 4,286.28

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Solution

The fourth proportional to 12,078.48, 18,116.76 and 4,286.28 is: 6,429.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,078.48 : 18,116.76 = 4,286.28 : x
  2. Step 2: Convert to fraction form
    12,078.48/18,116.76 = 4,286.28/x
  3. Step 3: Cross multiply
    12,078.48x = 18,116.76 × 4,286.28
  4. Step 4: Simplify right side
    12,078.48x = 77,653,506.05
  5. Step 5: Solve for x
    x = 77,653,506.05/12,078.48
  6. Step 6: Final answer
    x = 6,429.08

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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.