Home / 20,998.80-31,449.60-14,389.20

Finding the Fourth Proportional to 20,998.80, 31,449.60 and 14,389.20

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Solution

The fourth proportional to 20,998.80, 31,449.60 and 14,389.20 is: 21,550.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,998.80 : 31,449.60 = 14,389.20 : x
  2. Step 2: Convert to fraction form
    20,998.80/31,449.60 = 14,389.20/x
  3. Step 3: Cross multiply
    20,998.80x = 31,449.60 × 14,389.20
  4. Step 4: Simplify right side
    20,998.80x = 452,534,584.32
  5. Step 5: Solve for x
    x = 452,534,584.32/20,998.80
  6. Step 6: Final answer
    x = 21,550.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.