Home / 6,428.16-9,638.60-3,140.37

Finding the Fourth Proportional to 6,428.16, 9,638.60 and 3,140.37

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Solution

The fourth proportional to 6,428.16, 9,638.60 and 3,140.37 is: 4,708.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,428.16 : 9,638.60 = 3,140.37 : x
  2. Step 2: Convert to fraction form
    6,428.16/9,638.60 = 3,140.37/x
  3. Step 3: Cross multiply
    6,428.16x = 9,638.60 × 3,140.37
  4. Step 4: Simplify right side
    6,428.16x = 30,268,754.58
  5. Step 5: Solve for x
    x = 30,268,754.58/6,428.16
  6. Step 6: Final answer
    x = 4,708.77

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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.