Home / 12,980.19-19,470.29-3,619.83

Finding the Fourth Proportional to 12,980.19, 19,470.29 and 3,619.83

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Solution

The fourth proportional to 12,980.19, 19,470.29 and 3,619.83 is: 5,429.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,980.19 : 19,470.29 = 3,619.83 : x
  2. Step 2: Convert to fraction form
    12,980.19/19,470.29 = 3,619.83/x
  3. Step 3: Cross multiply
    12,980.19x = 19,470.29 × 3,619.83
  4. Step 4: Simplify right side
    12,980.19x = 70,479,139.85
  5. Step 5: Solve for x
    x = 70,479,139.85/12,980.19
  6. Step 6: Final answer
    x = 5,429.75

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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.