Home / 20,768.52-28,662.18-11,816.40

Finding the Fourth Proportional to 20,768.52, 28,662.18 and 11,816.40

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Solution

The fourth proportional to 20,768.52, 28,662.18 and 11,816.40 is: 16,307.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,768.52 : 28,662.18 = 11,816.40 : x
  2. Step 2: Convert to fraction form
    20,768.52/28,662.18 = 11,816.40/x
  3. Step 3: Cross multiply
    20,768.52x = 28,662.18 × 11,816.40
  4. Step 4: Simplify right side
    20,768.52x = 338,683,783.75
  5. Step 5: Solve for x
    x = 338,683,783.75/20,768.52
  6. Step 6: Final answer
    x = 16,307.56

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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.