Home / 12,986.84-17,918.94-7,950.66

Finding the Fourth Proportional to 12,986.84, 17,918.94 and 7,950.66

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Solution

The fourth proportional to 12,986.84, 17,918.94 and 7,950.66 is: 10,970.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,986.84 : 17,918.94 = 7,950.66 : x
  2. Step 2: Convert to fraction form
    12,986.84/17,918.94 = 7,950.66/x
  3. Step 3: Cross multiply
    12,986.84x = 17,918.94 × 7,950.66
  4. Step 4: Simplify right side
    12,986.84x = 142,467,399.50
  5. Step 5: Solve for x
    x = 142,467,399.50/12,986.84
  6. Step 6: Final answer
    x = 10,970.14

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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.