Home / 5,428.13-8,139.59-2,651.55

Finding the Fourth Proportional to 5,428.13, 8,139.59 and 2,651.55

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Solution

The fourth proportional to 5,428.13, 8,139.59 and 2,651.55 is: 3,976.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,428.13 : 8,139.59 = 2,651.55 : x
  2. Step 2: Convert to fraction form
    5,428.13/8,139.59 = 2,651.55/x
  3. Step 3: Cross multiply
    5,428.13x = 8,139.59 × 2,651.55
  4. Step 4: Simplify right side
    5,428.13x = 21,582,507.47
  5. Step 5: Solve for x
    x = 21,582,507.47/5,428.13
  6. Step 6: Final answer
    x = 3,976.05

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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.