Home / 5,015.87-6,925.25-3,128.21

Finding the Fourth Proportional to 5,015.87, 6,925.25 and 3,128.21

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Solution

The fourth proportional to 5,015.87, 6,925.25 and 3,128.21 is: 4,319.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,015.87 : 6,925.25 = 3,128.21 : x
  2. Step 2: Convert to fraction form
    5,015.87/6,925.25 = 3,128.21/x
  3. Step 3: Cross multiply
    5,015.87x = 6,925.25 × 3,128.21
  4. Step 4: Simplify right side
    5,015.87x = 21,663,661.44
  5. Step 5: Solve for x
    x = 21,663,661.44/5,015.87
  6. Step 6: Final answer
    x = 4,319.02

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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.