Home / 12,940.90-19,411.35-12,843.70

Finding the Fourth Proportional to 12,940.90, 19,411.35 and 12,843.70

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Solution

The fourth proportional to 12,940.90, 19,411.35 and 12,843.70 is: 19,265.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,940.90 : 19,411.35 = 12,843.70 : x
  2. Step 2: Convert to fraction form
    12,940.90/19,411.35 = 12,843.70/x
  3. Step 3: Cross multiply
    12,940.90x = 19,411.35 × 12,843.70
  4. Step 4: Simplify right side
    12,940.90x = 249,313,556.00
  5. Step 5: Solve for x
    x = 249,313,556.00/12,940.90
  6. Step 6: Final answer
    x = 19,265.55

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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.