Home / 12,189.08-18,285.84-3,871.19

Finding the Fourth Proportional to 12,189.08, 18,285.84 and 3,871.19

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Solution

The fourth proportional to 12,189.08, 18,285.84 and 3,871.19 is: 5,807.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,189.08 : 18,285.84 = 3,871.19 : x
  2. Step 2: Convert to fraction form
    12,189.08/18,285.84 = 3,871.19/x
  3. Step 3: Cross multiply
    12,189.08x = 18,285.84 × 3,871.19
  4. Step 4: Simplify right side
    12,189.08x = 70,787,869.52
  5. Step 5: Solve for x
    x = 70,787,869.52/12,189.08
  6. Step 6: Final answer
    x = 5,807.48

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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.