Home / 5,627.40-7,765.78-3,109.51

Finding the Fourth Proportional to 5,627.40, 7,765.78 and 3,109.51

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Solution

The fourth proportional to 5,627.40, 7,765.78 and 3,109.51 is: 4,291.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,627.40 : 7,765.78 = 3,109.51 : x
  2. Step 2: Convert to fraction form
    5,627.40/7,765.78 = 3,109.51/x
  3. Step 3: Cross multiply
    5,627.40x = 7,765.78 × 3,109.51
  4. Step 4: Simplify right side
    5,627.40x = 24,147,716.19
  5. Step 5: Solve for x
    x = 24,147,716.19/5,627.40
  6. Step 6: Final answer
    x = 4,291.10

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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.