Home / 5,215.20-7,813.20-4,389.60

Finding the Fourth Proportional to 5,215.20, 7,813.20 and 4,389.60

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Solution

The fourth proportional to 5,215.20, 7,813.20 and 4,389.60 is: 6,576.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,215.20 : 7,813.20 = 4,389.60 : x
  2. Step 2: Convert to fraction form
    5,215.20/7,813.20 = 4,389.60/x
  3. Step 3: Cross multiply
    5,215.20x = 7,813.20 × 4,389.60
  4. Step 4: Simplify right side
    5,215.20x = 34,296,822.72
  5. Step 5: Solve for x
    x = 34,296,822.72/5,215.20
  6. Step 6: Final answer
    x = 6,576.32

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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.