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Finding the Fourth Proportional to 12,216.55, 18,309.81 and 6,955.99

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Solution

The fourth proportional to 12,216.55, 18,309.81 and 6,955.99 is: 10,425.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,216.55 : 18,309.81 = 6,955.99 : x
  2. Step 2: Convert to fraction form
    12,216.55/18,309.81 = 6,955.99/x
  3. Step 3: Cross multiply
    12,216.55x = 18,309.81 × 6,955.99
  4. Step 4: Simplify right side
    12,216.55x = 127,362,855.26
  5. Step 5: Solve for x
    x = 127,362,855.26/12,216.55
  6. Step 6: Final answer
    x = 10,425.44

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1.5x scale

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.