Home / 12,121.82-16,723.75-7,643.93

Finding the Fourth Proportional to 12,121.82, 16,723.75 and 7,643.93

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Solution

The fourth proportional to 12,121.82, 16,723.75 and 7,643.93 is: 10,545.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,121.82 : 16,723.75 = 7,643.93 : x
  2. Step 2: Convert to fraction form
    12,121.82/16,723.75 = 7,643.93/x
  3. Step 3: Cross multiply
    12,121.82x = 16,723.75 × 7,643.93
  4. Step 4: Simplify right side
    12,121.82x = 127,835,136.12
  5. Step 5: Solve for x
    x = 127,835,136.12/12,121.82
  6. Step 6: Final answer
    x = 10,545.87

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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.