Home / 12,078.12-18,108.54-5,148.84

Finding the Fourth Proportional to 12,078.12, 18,108.54 and 5,148.84

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Solution

The fourth proportional to 12,078.12, 18,108.54 and 5,148.84 is: 7,719.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,078.12 : 18,108.54 = 5,148.84 : x
  2. Step 2: Convert to fraction form
    12,078.12/18,108.54 = 5,148.84/x
  3. Step 3: Cross multiply
    12,078.12x = 18,108.54 × 5,148.84
  4. Step 4: Simplify right side
    12,078.12x = 93,237,975.09
  5. Step 5: Solve for x
    x = 93,237,975.09/12,078.12
  6. Step 6: Final answer
    x = 7,719.58

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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.