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Finding the Fourth Proportional to 18,918.94, 26,107.77 and 12,950.46

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Solution

The fourth proportional to 18,918.94, 26,107.77 and 12,950.46 is: 17,871.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,918.94 : 26,107.77 = 12,950.46 : x
  2. Step 2: Convert to fraction form
    18,918.94/26,107.77 = 12,950.46/x
  3. Step 3: Cross multiply
    18,918.94x = 26,107.77 × 12,950.46
  4. Step 4: Simplify right side
    18,918.94x = 338,107,631.07
  5. Step 5: Solve for x
    x = 338,107,631.07/18,918.94
  6. Step 6: Final answer
    x = 17,871.38

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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.