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Finding the Fourth Proportional to 12,296.64, 16,968.78 and 6,990.87

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Solution

The fourth proportional to 12,296.64, 16,968.78 and 6,990.87 is: 9,647.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,296.64 : 16,968.78 = 6,990.87 : x
  2. Step 2: Convert to fraction form
    12,296.64/16,968.78 = 6,990.87/x
  3. Step 3: Cross multiply
    12,296.64x = 16,968.78 × 6,990.87
  4. Step 4: Simplify right side
    12,296.64x = 118,626,535.04
  5. Step 5: Solve for x
    x = 118,626,535.04/12,296.64
  6. Step 6: Final answer
    x = 9,647.07

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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.