Home / 6,430.78-9,647.39-2,213.92

Finding the Fourth Proportional to 6,430.78, 9,647.39 and 2,213.92

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Solution

The fourth proportional to 6,430.78, 9,647.39 and 2,213.92 is: 3,321.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,430.78 : 9,647.39 = 2,213.92 : x
  2. Step 2: Convert to fraction form
    6,430.78/9,647.39 = 2,213.92/x
  3. Step 3: Cross multiply
    6,430.78x = 9,647.39 × 2,213.92
  4. Step 4: Simplify right side
    6,430.78x = 21,358,549.67
  5. Step 5: Solve for x
    x = 21,358,549.67/6,430.78
  6. Step 6: Final answer
    x = 3,321.30

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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.