Home / 12,888.80-19,329.08-4,121.63

Finding the Fourth Proportional to 12,888.80, 19,329.08 and 4,121.63

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Solution

The fourth proportional to 12,888.80, 19,329.08 and 4,121.63 is: 6,181.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,888.80 : 19,329.08 = 4,121.63 : x
  2. Step 2: Convert to fraction form
    12,888.80/19,329.08 = 4,121.63/x
  3. Step 3: Cross multiply
    12,888.80x = 19,329.08 × 4,121.63
  4. Step 4: Simplify right side
    12,888.80x = 79,667,198.75
  5. Step 5: Solve for x
    x = 79,667,198.75/12,888.80
  6. Step 6: Final answer
    x = 6,181.12

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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.