Home / 20,951.90-28,914.12-11,392.34

Finding the Fourth Proportional to 20,951.90, 28,914.12 and 11,392.34

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Solution

The fourth proportional to 20,951.90, 28,914.12 and 11,392.34 is: 15,721.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,951.90 : 28,914.12 = 11,392.34 : x
  2. Step 2: Convert to fraction form
    20,951.90/28,914.12 = 11,392.34/x
  3. Step 3: Cross multiply
    20,951.90x = 28,914.12 × 11,392.34
  4. Step 4: Simplify right side
    20,951.90x = 329,399,485.84
  5. Step 5: Solve for x
    x = 329,399,485.84/20,951.90
  6. Step 6: Final answer
    x = 15,721.70

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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.