Home / 5,221.87-7,830.99-2,101.07

Finding the Fourth Proportional to 5,221.87, 7,830.99 and 2,101.07

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Solution

The fourth proportional to 5,221.87, 7,830.99 and 2,101.07 is: 3,150.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,221.87 : 7,830.99 = 2,101.07 : x
  2. Step 2: Convert to fraction form
    5,221.87/7,830.99 = 2,101.07/x
  3. Step 3: Cross multiply
    5,221.87x = 7,830.99 × 2,101.07
  4. Step 4: Simplify right side
    5,221.87x = 16,453,437.87
  5. Step 5: Solve for x
    x = 16,453,437.87/5,221.87
  6. Step 6: Final answer
    x = 3,150.87

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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.