Home / 20,580.51-28,383.31-13,407.73

Finding the Fourth Proportional to 20,580.51, 28,383.31 and 13,407.73

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Solution

The fourth proportional to 20,580.51, 28,383.31 and 13,407.73 is: 18,491.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,580.51 : 28,383.31 = 13,407.73 : x
  2. Step 2: Convert to fraction form
    20,580.51/28,383.31 = 13,407.73/x
  3. Step 3: Cross multiply
    20,580.51x = 28,383.31 × 13,407.73
  4. Step 4: Simplify right side
    20,580.51x = 380,555,702.79
  5. Step 5: Solve for x
    x = 380,555,702.79/20,580.51
  6. Step 6: Final answer
    x = 18,491.08

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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.