Home / 6,639.81-9,958.40-4,260.86

Finding the Fourth Proportional to 6,639.81, 9,958.40 and 4,260.86

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Solution

The fourth proportional to 6,639.81, 9,958.40 and 4,260.86 is: 6,390.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,639.81 : 9,958.40 = 4,260.86 : x
  2. Step 2: Convert to fraction form
    6,639.81/9,958.40 = 4,260.86/x
  3. Step 3: Cross multiply
    6,639.81x = 9,958.40 × 4,260.86
  4. Step 4: Simplify right side
    6,639.81x = 42,431,330.45
  5. Step 5: Solve for x
    x = 42,431,330.45/6,639.81
  6. Step 6: Final answer
    x = 6,390.44

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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.