Home / 5,638.85-8,455.91-1,688.68

Finding the Fourth Proportional to 5,638.85, 8,455.91 and 1,688.68

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Solution

The fourth proportional to 5,638.85, 8,455.91 and 1,688.68 is: 2,532.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,638.85 : 8,455.91 = 1,688.68 : x
  2. Step 2: Convert to fraction form
    5,638.85/8,455.91 = 1,688.68/x
  3. Step 3: Cross multiply
    5,638.85x = 8,455.91 × 1,688.68
  4. Step 4: Simplify right side
    5,638.85x = 14,279,328.23
  5. Step 5: Solve for x
    x = 14,279,328.23/5,638.85
  6. Step 6: Final answer
    x = 2,532.31

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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.