Home / 12,789.88-17,649.77-7,124.60

Finding the Fourth Proportional to 12,789.88, 17,649.77 and 7,124.60

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Solution

The fourth proportional to 12,789.88, 17,649.77 and 7,124.60 is: 9,831.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,789.88 : 17,649.77 = 7,124.60 : x
  2. Step 2: Convert to fraction form
    12,789.88/17,649.77 = 7,124.60/x
  3. Step 3: Cross multiply
    12,789.88x = 17,649.77 × 7,124.60
  4. Step 4: Simplify right side
    12,789.88x = 125,747,559.84
  5. Step 5: Solve for x
    x = 125,747,559.84/12,789.88
  6. Step 6: Final answer
    x = 9,831.80

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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.