Home / 6,415.20-9,603.60-5,647.20

Finding the Fourth Proportional to 6,415.20, 9,603.60 and 5,647.20

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Solution

The fourth proportional to 6,415.20, 9,603.60 and 5,647.20 is: 8,453.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,415.20 : 9,603.60 = 5,647.20 : x
  2. Step 2: Convert to fraction form
    6,415.20/9,603.60 = 5,647.20/x
  3. Step 3: Cross multiply
    6,415.20x = 9,603.60 × 5,647.20
  4. Step 4: Simplify right side
    6,415.20x = 54,233,449.92
  5. Step 5: Solve for x
    x = 54,233,449.92/6,415.20
  6. Step 6: Final answer
    x = 8,453.90

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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.