Home / 20,383.30-28,129.08-11,430.93

Finding the Fourth Proportional to 20,383.30, 28,129.08 and 11,430.93

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Solution

The fourth proportional to 20,383.30, 28,129.08 and 11,430.93 is: 15,774.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,383.30 : 28,129.08 = 11,430.93 : x
  2. Step 2: Convert to fraction form
    20,383.30/28,129.08 = 11,430.93/x
  3. Step 3: Cross multiply
    20,383.30x = 28,129.08 × 11,430.93
  4. Step 4: Simplify right side
    20,383.30x = 321,541,544.44
  5. Step 5: Solve for x
    x = 321,541,544.44/20,383.30
  6. Step 6: Final answer
    x = 15,774.75

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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.