Home / 5,378.27-7,421.32-3,138.51

Finding the Fourth Proportional to 5,378.27, 7,421.32 and 3,138.51

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Solution

The fourth proportional to 5,378.27, 7,421.32 and 3,138.51 is: 4,330.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,378.27 : 7,421.32 = 3,138.51 : x
  2. Step 2: Convert to fraction form
    5,378.27/7,421.32 = 3,138.51/x
  3. Step 3: Cross multiply
    5,378.27x = 7,421.32 × 3,138.51
  4. Step 4: Simplify right side
    5,378.27x = 23,291,918.79
  5. Step 5: Solve for x
    x = 23,291,918.79/5,378.27
  6. Step 6: Final answer
    x = 4,330.75

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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.