Home / 20,221.34-27,897.49-13,511.35

Finding the Fourth Proportional to 20,221.34, 27,897.49 and 13,511.35

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Solution

The fourth proportional to 20,221.34, 27,897.49 and 13,511.35 is: 18,640.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,221.34 : 27,897.49 = 13,511.35 : x
  2. Step 2: Convert to fraction form
    20,221.34/27,897.49 = 13,511.35/x
  3. Step 3: Cross multiply
    20,221.34x = 27,897.49 × 13,511.35
  4. Step 4: Simplify right side
    20,221.34x = 376,932,751.51
  5. Step 5: Solve for x
    x = 376,932,751.51/20,221.34
  6. Step 6: Final answer
    x = 18,640.34

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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.