Home / 12,920.80-19,379.38-4,154.60

Finding the Fourth Proportional to 12,920.80, 19,379.38 and 4,154.60

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Solution

The fourth proportional to 12,920.80, 19,379.38 and 4,154.60 is: 6,231.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,920.80 : 19,379.38 = 4,154.60 : x
  2. Step 2: Convert to fraction form
    12,920.80/19,379.38 = 4,154.60/x
  3. Step 3: Cross multiply
    12,920.80x = 19,379.38 × 4,154.60
  4. Step 4: Simplify right side
    12,920.80x = 80,513,572.15
  5. Step 5: Solve for x
    x = 80,513,572.15/12,920.80
  6. Step 6: Final answer
    x = 6,231.31

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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.