Home / 5,421.39-8,128.73-2,340.75

Finding the Fourth Proportional to 5,421.39, 8,128.73 and 2,340.75

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Solution

The fourth proportional to 5,421.39, 8,128.73 and 2,340.75 is: 3,509.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,421.39 : 8,128.73 = 2,340.75 : x
  2. Step 2: Convert to fraction form
    5,421.39/8,128.73 = 2,340.75/x
  3. Step 3: Cross multiply
    5,421.39x = 8,128.73 × 2,340.75
  4. Step 4: Simplify right side
    5,421.39x = 19,027,313.04
  5. Step 5: Solve for x
    x = 19,027,313.04/5,421.39
  6. Step 6: Final answer
    x = 3,509.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.