Home / 39,219.91-54,121.23-21,314.77

Finding the Fourth Proportional to 39,219.91, 54,121.23 and 21,314.77

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Solution

The fourth proportional to 39,219.91, 54,121.23 and 21,314.77 is: 29,413.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,219.91 : 54,121.23 = 21,314.77 : x
  2. Step 2: Convert to fraction form
    39,219.91/54,121.23 = 21,314.77/x
  3. Step 3: Cross multiply
    39,219.91x = 54,121.23 × 21,314.77
  4. Step 4: Simplify right side
    39,219.91x = 1,153,581,569.57
  5. Step 5: Solve for x
    x = 1,153,581,569.57/39,219.91
  6. Step 6: Final answer
    x = 29,413.16

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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.