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Finding the Fourth Proportional to 8,756.78, 13,136.02 and 2,913.80

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Solution

The fourth proportional to 8,756.78, 13,136.02 and 2,913.80 is: 4,370.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,756.78 : 13,136.02 = 2,913.80 : x
  2. Step 2: Convert to fraction form
    8,756.78/13,136.02 = 2,913.80/x
  3. Step 3: Cross multiply
    8,756.78x = 13,136.02 × 2,913.80
  4. Step 4: Simplify right side
    8,756.78x = 38,275,735.08
  5. Step 5: Solve for x
    x = 38,275,735.08/8,756.78
  6. Step 6: Final answer
    x = 4,370.98

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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.