Home / 12,890.88-19,339.56-4,125.60

Finding the Fourth Proportional to 12,890.88, 19,339.56 and 4,125.60

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Solution

The fourth proportional to 12,890.88, 19,339.56 and 4,125.60 is: 6,189.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,890.88 : 19,339.56 = 4,125.60 : x
  2. Step 2: Convert to fraction form
    12,890.88/19,339.56 = 4,125.60/x
  3. Step 3: Cross multiply
    12,890.88x = 19,339.56 × 4,125.60
  4. Step 4: Simplify right side
    12,890.88x = 79,787,288.74
  5. Step 5: Solve for x
    x = 79,787,288.74/12,890.88
  6. Step 6: Final answer
    x = 6,189.44

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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.