Home / 20,957.24-28,920.42-11,525.80

Finding the Fourth Proportional to 20,957.24, 28,920.42 and 11,525.80

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Solution

The fourth proportional to 20,957.24, 28,920.42 and 11,525.80 is: 15,905.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,957.24 : 28,920.42 = 11,525.80 : x
  2. Step 2: Convert to fraction form
    20,957.24/28,920.42 = 11,525.80/x
  3. Step 3: Cross multiply
    20,957.24x = 28,920.42 × 11,525.80
  4. Step 4: Simplify right side
    20,957.24x = 333,330,976.84
  5. Step 5: Solve for x
    x = 333,330,976.84/20,957.24
  6. Step 6: Final answer
    x = 15,905.29

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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.