Home / 20,816.25-28,725.84-11,384.61

Finding the Fourth Proportional to 20,816.25, 28,725.84 and 11,384.61

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Solution

The fourth proportional to 20,816.25, 28,725.84 and 11,384.61 is: 15,710.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,816.25 : 28,725.84 = 11,384.61 : x
  2. Step 2: Convert to fraction form
    20,816.25/28,725.84 = 11,384.61/x
  3. Step 3: Cross multiply
    20,816.25x = 28,725.84 × 11,384.61
  4. Step 4: Simplify right side
    20,816.25x = 327,032,485.32
  5. Step 5: Solve for x
    x = 327,032,485.32/20,816.25
  6. Step 6: Final answer
    x = 15,710.44

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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.