Home / 21,920.04-30,242.49-13,413.30

Finding the Fourth Proportional to 21,920.04, 30,242.49 and 13,413.30

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Solution

The fourth proportional to 21,920.04, 30,242.49 and 13,413.30 is: 18,505.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,920.04 : 30,242.49 = 13,413.30 : x
  2. Step 2: Convert to fraction form
    21,920.04/30,242.49 = 13,413.30/x
  3. Step 3: Cross multiply
    21,920.04x = 30,242.49 × 13,413.30
  4. Step 4: Simplify right side
    21,920.04x = 405,651,465.13
  5. Step 5: Solve for x
    x = 405,651,465.13/21,920.04
  6. Step 6: Final answer
    x = 18,505.96

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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.