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Finding the Fourth Proportional to 5,655.80, 8,487.30 and 3,315.80

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Solution

The fourth proportional to 5,655.80, 8,487.30 and 3,315.80 is: 4,975.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,655.80 : 8,487.30 = 3,315.80 : x
  2. Step 2: Convert to fraction form
    5,655.80/8,487.30 = 3,315.80/x
  3. Step 3: Cross multiply
    5,655.80x = 8,487.30 × 3,315.80
  4. Step 4: Simplify right side
    5,655.80x = 28,142,189.34
  5. Step 5: Solve for x
    x = 28,142,189.34/5,655.80
  6. Step 6: Final answer
    x = 4,975.81

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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.