Home / 20,480.31-28,271.54-13,769.82

Finding the Fourth Proportional to 20,480.31, 28,271.54 and 13,769.82

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Solution

The fourth proportional to 20,480.31, 28,271.54 and 13,769.82 is: 19,008.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,480.31 : 28,271.54 = 13,769.82 : x
  2. Step 2: Convert to fraction form
    20,480.31/28,271.54 = 13,769.82/x
  3. Step 3: Cross multiply
    20,480.31x = 28,271.54 × 13,769.82
  4. Step 4: Simplify right side
    20,480.31x = 389,294,051.35
  5. Step 5: Solve for x
    x = 389,294,051.35/20,480.31
  6. Step 6: Final answer
    x = 19,008.21

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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.