Home / 8,649.20-12,975.60-3,720.08

Finding the Fourth Proportional to 8,649.20, 12,975.60 and 3,720.08

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Solution

The fourth proportional to 8,649.20, 12,975.60 and 3,720.08 is: 5,580.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,649.20 : 12,975.60 = 3,720.08 : x
  2. Step 2: Convert to fraction form
    8,649.20/12,975.60 = 3,720.08/x
  3. Step 3: Cross multiply
    8,649.20x = 12,975.60 × 3,720.08
  4. Step 4: Simplify right side
    8,649.20x = 48,270,270.05
  5. Step 5: Solve for x
    x = 48,270,270.05/8,649.20
  6. Step 6: Final answer
    x = 5,580.89

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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.