Home / 12,390.78-18,574.14-4,065.06

Finding the Fourth Proportional to 12,390.78, 18,574.14 and 4,065.06

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Solution

The fourth proportional to 12,390.78, 18,574.14 and 4,065.06 is: 6,093.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,390.78 : 18,574.14 = 4,065.06 : x
  2. Step 2: Convert to fraction form
    12,390.78/18,574.14 = 4,065.06/x
  3. Step 3: Cross multiply
    12,390.78x = 18,574.14 × 4,065.06
  4. Step 4: Simplify right side
    12,390.78x = 75,504,993.55
  5. Step 5: Solve for x
    x = 75,504,993.55/12,390.78
  6. Step 6: Final answer
    x = 6,093.64

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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.