Home / 12,986.34-17,921.15-7,017.99

Finding the Fourth Proportional to 12,986.34, 17,921.15 and 7,017.99

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Solution

The fourth proportional to 12,986.34, 17,921.15 and 7,017.99 is: 9,684.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,986.34 : 17,921.15 = 7,017.99 : x
  2. Step 2: Convert to fraction form
    12,986.34/17,921.15 = 7,017.99/x
  3. Step 3: Cross multiply
    12,986.34x = 17,921.15 × 7,017.99
  4. Step 4: Simplify right side
    12,986.34x = 125,770,451.49
  5. Step 5: Solve for x
    x = 125,770,451.49/12,986.34
  6. Step 6: Final answer
    x = 9,684.83

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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.