Home / 12,355.12-18,532.80-3,121.12

Finding the Fourth Proportional to 12,355.12, 18,532.80 and 3,121.12

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Solution

The fourth proportional to 12,355.12, 18,532.80 and 3,121.12 is: 4,681.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,355.12 : 18,532.80 = 3,121.12 : x
  2. Step 2: Convert to fraction form
    12,355.12/18,532.80 = 3,121.12/x
  3. Step 3: Cross multiply
    12,355.12x = 18,532.80 × 3,121.12
  4. Step 4: Simplify right side
    12,355.12x = 57,843,092.74
  5. Step 5: Solve for x
    x = 57,843,092.74/12,355.12
  6. Step 6: Final answer
    x = 4,681.71

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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.