Home / 21,909.57-30,230.96-13,413.63

Finding the Fourth Proportional to 21,909.57, 30,230.96 and 13,413.63

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Solution

The fourth proportional to 21,909.57, 30,230.96 and 13,413.63 is: 18,508.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,909.57 : 30,230.96 = 13,413.63 : x
  2. Step 2: Convert to fraction form
    21,909.57/30,230.96 = 13,413.63/x
  3. Step 3: Cross multiply
    21,909.57x = 30,230.96 × 13,413.63
  4. Step 4: Simplify right side
    21,909.57x = 405,506,844.92
  5. Step 5: Solve for x
    x = 405,506,844.92/21,909.57
  6. Step 6: Final answer
    x = 18,508.21

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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.