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Finding the Fourth Proportional to 12,291.44, 16,960.44 and 6,985.12

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Solution

The fourth proportional to 12,291.44, 16,960.44 and 6,985.12 is: 9,638.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,291.44 : 16,960.44 = 6,985.12 : x
  2. Step 2: Convert to fraction form
    12,291.44/16,960.44 = 6,985.12/x
  3. Step 3: Cross multiply
    12,291.44x = 16,960.44 × 6,985.12
  4. Step 4: Simplify right side
    12,291.44x = 118,470,708.65
  5. Step 5: Solve for x
    x = 118,470,708.65/12,291.44
  6. Step 6: Final answer
    x = 9,638.47

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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.