Home / 20,601.12-28,429.29-11,169.66

Finding the Fourth Proportional to 20,601.12, 28,429.29 and 11,169.66

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Solution

The fourth proportional to 20,601.12, 28,429.29 and 11,169.66 is: 15,413.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,601.12 : 28,429.29 = 11,169.66 : x
  2. Step 2: Convert to fraction form
    20,601.12/28,429.29 = 11,169.66/x
  3. Step 3: Cross multiply
    20,601.12x = 28,429.29 × 11,169.66
  4. Step 4: Simplify right side
    20,601.12x = 317,545,503.34
  5. Step 5: Solve for x
    x = 317,545,503.34/20,601.12
  6. Step 6: Final answer
    x = 15,413.99

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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.