Home / 6,639.26-9,159.93-4,120.47

Finding the Fourth Proportional to 6,639.26, 9,159.93 and 4,120.47

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Solution

The fourth proportional to 6,639.26, 9,159.93 and 4,120.47 is: 5,684.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,639.26 : 9,159.93 = 4,120.47 : x
  2. Step 2: Convert to fraction form
    6,639.26/9,159.93 = 4,120.47/x
  3. Step 3: Cross multiply
    6,639.26x = 9,159.93 × 4,120.47
  4. Step 4: Simplify right side
    6,639.26x = 37,743,216.77
  5. Step 5: Solve for x
    x = 37,743,216.77/6,639.26
  6. Step 6: Final answer
    x = 5,684.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.