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Finding the Fourth Proportional to 12,297.78, 16,969.68 and 6,990.66

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Solution

The fourth proportional to 12,297.78, 16,969.68 and 6,990.66 is: 9,646.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,297.78 : 16,969.68 = 6,990.66 : x
  2. Step 2: Convert to fraction form
    12,297.78/16,969.68 = 6,990.66/x
  3. Step 3: Cross multiply
    12,297.78x = 16,969.68 × 6,990.66
  4. Step 4: Simplify right side
    12,297.78x = 118,629,263.19
  5. Step 5: Solve for x
    x = 118,629,263.19/12,297.78
  6. Step 6: Final answer
    x = 9,646.40

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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.