Home / 4,259.86-6,389.11-2,181.40

Finding the Fourth Proportional to 4,259.86, 6,389.11 and 2,181.40

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Solution

The fourth proportional to 4,259.86, 6,389.11 and 2,181.40 is: 3,271.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,259.86 : 6,389.11 = 2,181.40 : x
  2. Step 2: Convert to fraction form
    4,259.86/6,389.11 = 2,181.40/x
  3. Step 3: Cross multiply
    4,259.86x = 6,389.11 × 2,181.40
  4. Step 4: Simplify right side
    4,259.86x = 13,937,204.55
  5. Step 5: Solve for x
    x = 13,937,204.55/4,259.86
  6. Step 6: Final answer
    x = 3,271.75

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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.