Home / 6,820.99-10,221.90-5,428.13

Finding the Fourth Proportional to 6,820.99, 10,221.90 and 5,428.13

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Solution

The fourth proportional to 6,820.99, 10,221.90 and 5,428.13 is: 8,134.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,820.99 : 10,221.90 = 5,428.13 : x
  2. Step 2: Convert to fraction form
    6,820.99/10,221.90 = 5,428.13/x
  3. Step 3: Cross multiply
    6,820.99x = 10,221.90 × 5,428.13
  4. Step 4: Simplify right side
    6,820.99x = 55,485,802.05
  5. Step 5: Solve for x
    x = 55,485,802.05/6,820.99
  6. Step 6: Final answer
    x = 8,134.57

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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.