Home / 3,130.42-4,314.93-2,121.79

Finding the Fourth Proportional to 3,130.42, 4,314.93 and 2,121.79

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Solution

The fourth proportional to 3,130.42, 4,314.93 and 2,121.79 is: 2,924.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,130.42 : 4,314.93 = 2,121.79 : x
  2. Step 2: Convert to fraction form
    3,130.42/4,314.93 = 2,121.79/x
  3. Step 3: Cross multiply
    3,130.42x = 4,314.93 × 2,121.79
  4. Step 4: Simplify right side
    3,130.42x = 9,155,375.32
  5. Step 5: Solve for x
    x = 9,155,375.32/3,130.42
  6. Step 6: Final answer
    x = 2,924.65

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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.