Home / 39,413.88-54,390.96-21,508.74

Finding the Fourth Proportional to 39,413.88, 54,390.96 and 21,508.74

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Solution

The fourth proportional to 39,413.88, 54,390.96 and 21,508.74 is: 29,681.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,413.88 : 54,390.96 = 21,508.74 : x
  2. Step 2: Convert to fraction form
    39,413.88/54,390.96 = 21,508.74/x
  3. Step 3: Cross multiply
    39,413.88x = 54,390.96 × 21,508.74
  4. Step 4: Simplify right side
    39,413.88x = 1,169,881,016.99
  5. Step 5: Solve for x
    x = 1,169,881,016.99/39,413.88
  6. Step 6: Final answer
    x = 29,681.96

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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.