Home / 2,143.40-3,235.67-2,121.80

Finding the Fourth Proportional to 2,143.40, 3,235.67 and 2,121.80

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Solution

The fourth proportional to 2,143.40, 3,235.67 and 2,121.80 is: 3,203.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,143.40 : 3,235.67 = 2,121.80 : x
  2. Step 2: Convert to fraction form
    2,143.40/3,235.67 = 2,121.80/x
  3. Step 3: Cross multiply
    2,143.40x = 3,235.67 × 2,121.80
  4. Step 4: Simplify right side
    2,143.40x = 6,865,444.61
  5. Step 5: Solve for x
    x = 6,865,444.61/2,143.40
  6. Step 6: Final answer
    x = 3,203.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.