Home / 5,428.80-8,143.20-2,140.56

Finding the Fourth Proportional to 5,428.80, 8,143.20 and 2,140.56

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Solution

The fourth proportional to 5,428.80, 8,143.20 and 2,140.56 is: 3,210.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,428.80 : 8,143.20 = 2,140.56 : x
  2. Step 2: Convert to fraction form
    5,428.80/8,143.20 = 2,140.56/x
  3. Step 3: Cross multiply
    5,428.80x = 8,143.20 × 2,140.56
  4. Step 4: Simplify right side
    5,428.80x = 17,431,008.19
  5. Step 5: Solve for x
    x = 17,431,008.19/5,428.80
  6. Step 6: Final answer
    x = 3,210.84

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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.