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Finding the Fourth Proportional to 8,647.90, 12,973.20 and 2,803.75

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Solution

The fourth proportional to 8,647.90, 12,973.20 and 2,803.75 is: 4,206.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,647.90 : 12,973.20 = 2,803.75 : x
  2. Step 2: Convert to fraction form
    8,647.90/12,973.20 = 2,803.75/x
  3. Step 3: Cross multiply
    8,647.90x = 12,973.20 × 2,803.75
  4. Step 4: Simplify right side
    8,647.90x = 36,373,609.50
  5. Step 5: Solve for x
    x = 36,373,609.50/8,647.90
  6. Step 6: Final answer
    x = 4,206.06

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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.