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Finding the Fourth Proportional to 13,226.30, 18,251.74 and 7,918.01

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Solution

The fourth proportional to 13,226.30, 18,251.74 and 7,918.01 is: 10,926.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,226.30 : 18,251.74 = 7,918.01 : x
  2. Step 2: Convert to fraction form
    13,226.30/18,251.74 = 7,918.01/x
  3. Step 3: Cross multiply
    13,226.30x = 18,251.74 × 7,918.01
  4. Step 4: Simplify right side
    13,226.30x = 144,517,459.84
  5. Step 5: Solve for x
    x = 144,517,459.84/13,226.30
  6. Step 6: Final answer
    x = 10,926.52

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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.