Home / 21,315.27-29,413.99-11,756.82

Finding the Fourth Proportional to 21,315.27, 29,413.99 and 11,756.82

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Solution

The fourth proportional to 21,315.27, 29,413.99 and 11,756.82 is: 16,223.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,315.27 : 29,413.99 = 11,756.82 : x
  2. Step 2: Convert to fraction form
    21,315.27/29,413.99 = 11,756.82/x
  3. Step 3: Cross multiply
    21,315.27x = 29,413.99 × 11,756.82
  4. Step 4: Simplify right side
    21,315.27x = 345,814,985.91
  5. Step 5: Solve for x
    x = 345,814,985.91/21,315.27
  6. Step 6: Final answer
    x = 16,223.81

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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.