Home / 39,413.46-54,390.38-21,509.49

Finding the Fourth Proportional to 39,413.46, 54,390.38 and 21,509.49

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Solution

The fourth proportional to 39,413.46, 54,390.38 and 21,509.49 is: 29,682.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,413.46 : 54,390.38 = 21,509.49 : x
  2. Step 2: Convert to fraction form
    39,413.46/54,390.38 = 21,509.49/x
  3. Step 3: Cross multiply
    39,413.46x = 54,390.38 × 21,509.49
  4. Step 4: Simplify right side
    39,413.46x = 1,169,909,227.16
  5. Step 5: Solve for x
    x = 1,169,909,227.16/39,413.46
  6. Step 6: Final answer
    x = 29,682.99

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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.