Home / 12,121.49-16,728.98-7,087.41

Finding the Fourth Proportional to 12,121.49, 16,728.98 and 7,087.41

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Solution

The fourth proportional to 12,121.49, 16,728.98 and 7,087.41 is: 9,781.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,121.49 : 16,728.98 = 7,087.41 : x
  2. Step 2: Convert to fraction form
    12,121.49/16,728.98 = 7,087.41/x
  3. Step 3: Cross multiply
    12,121.49x = 16,728.98 × 7,087.41
  4. Step 4: Simplify right side
    12,121.49x = 118,565,104.70
  5. Step 5: Solve for x
    x = 118,565,104.70/12,121.49
  6. Step 6: Final answer
    x = 9,781.39

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Double scale
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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.