Home / 5,378.10-7,421.37-3,019.78

Finding the Fourth Proportional to 5,378.10, 7,421.37 and 3,019.78

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Solution

The fourth proportional to 5,378.10, 7,421.37 and 3,019.78 is: 4,167.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,378.10 : 7,421.37 = 3,019.78 : x
  2. Step 2: Convert to fraction form
    5,378.10/7,421.37 = 3,019.78/x
  3. Step 3: Cross multiply
    5,378.10x = 7,421.37 × 3,019.78
  4. Step 4: Simplify right side
    5,378.10x = 22,410,902.65
  5. Step 5: Solve for x
    x = 22,410,902.65/5,378.10
  6. Step 6: Final answer
    x = 4,167.07

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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.