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Finding the Fourth Proportional to 8,580.99, 12,868.75 and 4,420.45

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Solution

The fourth proportional to 8,580.99, 12,868.75 and 4,420.45 is: 6,629.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,580.99 : 12,868.75 = 4,420.45 : x
  2. Step 2: Convert to fraction form
    8,580.99/12,868.75 = 4,420.45/x
  3. Step 3: Cross multiply
    8,580.99x = 12,868.75 × 4,420.45
  4. Step 4: Simplify right side
    8,580.99x = 56,885,665.94
  5. Step 5: Solve for x
    x = 56,885,665.94/8,580.99
  6. Step 6: Final answer
    x = 6,629.27

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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.