Home / 12,911.90-19,370.55-4,147.70

Finding the Fourth Proportional to 12,911.90, 19,370.55 and 4,147.70

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Solution

The fourth proportional to 12,911.90, 19,370.55 and 4,147.70 is: 6,222.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,911.90 : 19,370.55 = 4,147.70 : x
  2. Step 2: Convert to fraction form
    12,911.90/19,370.55 = 4,147.70/x
  3. Step 3: Cross multiply
    12,911.90x = 19,370.55 × 4,147.70
  4. Step 4: Simplify right side
    12,911.90x = 80,343,230.24
  5. Step 5: Solve for x
    x = 80,343,230.24/12,911.90
  6. Step 6: Final answer
    x = 6,222.42

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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.