Home / 6,421.38-9,638.61-3,459.69

Finding the Fourth Proportional to 6,421.38, 9,638.61 and 3,459.69

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Solution

The fourth proportional to 6,421.38, 9,638.61 and 3,459.69 is: 5,193.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,421.38 : 9,638.61 = 3,459.69 : x
  2. Step 2: Convert to fraction form
    6,421.38/9,638.61 = 3,459.69/x
  3. Step 3: Cross multiply
    6,421.38x = 9,638.61 × 3,459.69
  4. Step 4: Simplify right side
    6,421.38x = 33,346,638.78
  5. Step 5: Solve for x
    x = 33,346,638.78/6,421.38
  6. Step 6: Final answer
    x = 5,193.07

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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.