Home / 20,852.54-28,778.58-11,901.40

Finding the Fourth Proportional to 20,852.54, 28,778.58 and 11,901.40

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Solution

The fourth proportional to 20,852.54, 28,778.58 and 11,901.40 is: 16,425.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,852.54 : 28,778.58 = 11,901.40 : x
  2. Step 2: Convert to fraction form
    20,852.54/28,778.58 = 11,901.40/x
  3. Step 3: Cross multiply
    20,852.54x = 28,778.58 × 11,901.40
  4. Step 4: Simplify right side
    20,852.54x = 342,505,188.61
  5. Step 5: Solve for x
    x = 342,505,188.61/20,852.54
  6. Step 6: Final answer
    x = 16,425.11

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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.