Home / 2,143.20-3,214.80-2,042.40

Finding the Fourth Proportional to 2,143.20, 3,214.80 and 2,042.40

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Solution

The fourth proportional to 2,143.20, 3,214.80 and 2,042.40 is: 3,063.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,143.20 : 3,214.80 = 2,042.40 : x
  2. Step 2: Convert to fraction form
    2,143.20/3,214.80 = 2,042.40/x
  3. Step 3: Cross multiply
    2,143.20x = 3,214.80 × 2,042.40
  4. Step 4: Simplify right side
    2,143.20x = 6,565,907.52
  5. Step 5: Solve for x
    x = 6,565,907.52/2,143.20
  6. Step 6: Final answer
    x = 3,063.60

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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.