Home / 20,463.78-28,239.75-11,511.26

Finding the Fourth Proportional to 20,463.78, 28,239.75 and 11,511.26

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Solution

The fourth proportional to 20,463.78, 28,239.75 and 11,511.26 is: 15,885.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,463.78 : 28,239.75 = 11,511.26 : x
  2. Step 2: Convert to fraction form
    20,463.78/28,239.75 = 11,511.26/x
  3. Step 3: Cross multiply
    20,463.78x = 28,239.75 × 11,511.26
  4. Step 4: Simplify right side
    20,463.78x = 325,075,104.59
  5. Step 5: Solve for x
    x = 325,075,104.59/20,463.78
  6. Step 6: Final answer
    x = 15,885.39

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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.