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Finding the Fourth Proportional to 12,289.68, 16,960.05 and 6,984.45

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Solution

The fourth proportional to 12,289.68, 16,960.05 and 6,984.45 is: 9,638.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,289.68 : 16,960.05 = 6,984.45 : x
  2. Step 2: Convert to fraction form
    12,289.68/16,960.05 = 6,984.45/x
  3. Step 3: Cross multiply
    12,289.68x = 16,960.05 × 6,984.45
  4. Step 4: Simplify right side
    12,289.68x = 118,456,621.22
  5. Step 5: Solve for x
    x = 118,456,621.22/12,289.68
  6. Step 6: Final answer
    x = 9,638.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.