Home / 20,208.76-27,865.80-13,836.40

Finding the Fourth Proportional to 20,208.76, 27,865.80 and 13,836.40

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Solution

The fourth proportional to 20,208.76, 27,865.80 and 13,836.40 is: 19,078.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,208.76 : 27,865.80 = 13,836.40 : x
  2. Step 2: Convert to fraction form
    20,208.76/27,865.80 = 13,836.40/x
  3. Step 3: Cross multiply
    20,208.76x = 27,865.80 × 13,836.40
  4. Step 4: Simplify right side
    20,208.76x = 385,562,355.12
  5. Step 5: Solve for x
    x = 385,562,355.12/20,208.76
  6. Step 6: Final answer
    x = 19,078.97

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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.