Home / 12,619.20-18,928.80-4,409.28

Finding the Fourth Proportional to 12,619.20, 18,928.80 and 4,409.28

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Solution

The fourth proportional to 12,619.20, 18,928.80 and 4,409.28 is: 6,613.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,619.20 : 18,928.80 = 4,409.28 : x
  2. Step 2: Convert to fraction form
    12,619.20/18,928.80 = 4,409.28/x
  3. Step 3: Cross multiply
    12,619.20x = 18,928.80 × 4,409.28
  4. Step 4: Simplify right side
    12,619.20x = 83,462,379.26
  5. Step 5: Solve for x
    x = 83,462,379.26/12,619.20
  6. Step 6: Final answer
    x = 6,613.92

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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.