Home / 20,830.24-28,745.70-11,398.80

Finding the Fourth Proportional to 20,830.24, 28,745.70 and 11,398.80

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Solution

The fourth proportional to 20,830.24, 28,745.70 and 11,398.80 is: 15,730.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,830.24 : 28,745.70 = 11,398.80 : x
  2. Step 2: Convert to fraction form
    20,830.24/28,745.70 = 11,398.80/x
  3. Step 3: Cross multiply
    20,830.24x = 28,745.70 × 11,398.80
  4. Step 4: Simplify right side
    20,830.24x = 327,666,485.16
  5. Step 5: Solve for x
    x = 327,666,485.16/20,830.24
  6. Step 6: Final answer
    x = 15,730.33

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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.