Home / 12,379.40-18,571.16-6,139.62

Finding the Fourth Proportional to 12,379.40, 18,571.16 and 6,139.62

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Solution

The fourth proportional to 12,379.40, 18,571.16 and 6,139.62 is: 9,210.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,379.40 : 18,571.16 = 6,139.62 : x
  2. Step 2: Convert to fraction form
    12,379.40/18,571.16 = 6,139.62/x
  3. Step 3: Cross multiply
    12,379.40x = 18,571.16 × 6,139.62
  4. Step 4: Simplify right side
    12,379.40x = 114,019,865.36
  5. Step 5: Solve for x
    x = 114,019,865.36/12,379.40
  6. Step 6: Final answer
    x = 9,210.45

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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.