Home / 3,213.40-4,814.70-2,117.20

Finding the Fourth Proportional to 3,213.40, 4,814.70 and 2,117.20

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Solution

The fourth proportional to 3,213.40, 4,814.70 and 2,117.20 is: 3,172.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,213.40 : 4,814.70 = 2,117.20 : x
  2. Step 2: Convert to fraction form
    3,213.40/4,814.70 = 2,117.20/x
  3. Step 3: Cross multiply
    3,213.40x = 4,814.70 × 2,117.20
  4. Step 4: Simplify right side
    3,213.40x = 10,193,682.84
  5. Step 5: Solve for x
    x = 10,193,682.84/3,213.40
  6. Step 6: Final answer
    x = 3,172.24

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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.