Home / 21,998.40-30,362.20-13,050.86

Finding the Fourth Proportional to 21,998.40, 30,362.20 and 13,050.86

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Solution

The fourth proportional to 21,998.40, 30,362.20 and 13,050.86 is: 18,012.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,998.40 : 30,362.20 = 13,050.86 : x
  2. Step 2: Convert to fraction form
    21,998.40/30,362.20 = 13,050.86/x
  3. Step 3: Cross multiply
    21,998.40x = 30,362.20 × 13,050.86
  4. Step 4: Simplify right side
    21,998.40x = 396,252,821.49
  5. Step 5: Solve for x
    x = 396,252,821.49/21,998.40
  6. Step 6: Final answer
    x = 18,012.80

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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.