Home / 12,986.61-19,449.54-6,391.59

Finding the Fourth Proportional to 12,986.61, 19,449.54 and 6,391.59

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Solution

The fourth proportional to 12,986.61, 19,449.54 and 6,391.59 is: 9,572.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,986.61 : 19,449.54 = 6,391.59 : x
  2. Step 2: Convert to fraction form
    12,986.61/19,449.54 = 6,391.59/x
  3. Step 3: Cross multiply
    12,986.61x = 19,449.54 × 6,391.59
  4. Step 4: Simplify right side
    12,986.61x = 124,313,485.37
  5. Step 5: Solve for x
    x = 124,313,485.37/12,986.61
  6. Step 6: Final answer
    x = 9,572.44

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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.