Home / 12,986.88-19,487.76-5,489.84

Finding the Fourth Proportional to 12,986.88, 19,487.76 and 5,489.84

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Solution

The fourth proportional to 12,986.88, 19,487.76 and 5,489.84 is: 8,237.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,986.88 : 19,487.76 = 5,489.84 : x
  2. Step 2: Convert to fraction form
    12,986.88/19,487.76 = 5,489.84/x
  3. Step 3: Cross multiply
    12,986.88x = 19,487.76 × 5,489.84
  4. Step 4: Simplify right side
    12,986.88x = 106,984,684.36
  5. Step 5: Solve for x
    x = 106,984,684.36/12,986.88
  6. Step 6: Final answer
    x = 8,237.91

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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.