Home / 2,157.49-3,216.80-2,103.67

Finding the Fourth Proportional to 2,157.49, 3,216.80 and 2,103.67

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Solution

The fourth proportional to 2,157.49, 3,216.80 and 2,103.67 is: 3,136.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,157.49 : 3,216.80 = 2,103.67 : x
  2. Step 2: Convert to fraction form
    2,157.49/3,216.80 = 2,103.67/x
  3. Step 3: Cross multiply
    2,157.49x = 3,216.80 × 2,103.67
  4. Step 4: Simplify right side
    2,157.49x = 6,767,065.01
  5. Step 5: Solve for x
    x = 6,767,065.01/2,157.49
  6. Step 6: Final answer
    x = 3,136.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.