Home / 3,239.40-4,853.70-2,143.20

Finding the Fourth Proportional to 3,239.40, 4,853.70 and 2,143.20

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Solution

The fourth proportional to 3,239.40, 4,853.70 and 2,143.20 is: 3,211.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,239.40 : 4,853.70 = 2,143.20 : x
  2. Step 2: Convert to fraction form
    3,239.40/4,853.70 = 2,143.20/x
  3. Step 3: Cross multiply
    3,239.40x = 4,853.70 × 2,143.20
  4. Step 4: Simplify right side
    3,239.40x = 10,402,449.84
  5. Step 5: Solve for x
    x = 10,402,449.84/3,239.40
  6. Step 6: Final answer
    x = 3,211.23

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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.