Home / 12,211.95-16,855.81-7,177.79

Finding the Fourth Proportional to 12,211.95, 16,855.81 and 7,177.79

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Solution

The fourth proportional to 12,211.95, 16,855.81 and 7,177.79 is: 9,907.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,211.95 : 16,855.81 = 7,177.79 : x
  2. Step 2: Convert to fraction form
    12,211.95/16,855.81 = 7,177.79/x
  3. Step 3: Cross multiply
    12,211.95x = 16,855.81 × 7,177.79
  4. Step 4: Simplify right side
    12,211.95x = 120,987,451.34
  5. Step 5: Solve for x
    x = 120,987,451.34/12,211.95
  6. Step 6: Final answer
    x = 9,907.30

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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.