Home / 20,787.98-28,687.44-11,835.48

Finding the Fourth Proportional to 20,787.98, 28,687.44 and 11,835.48

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Solution

The fourth proportional to 20,787.98, 28,687.44 and 11,835.48 is: 16,332.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,787.98 : 28,687.44 = 11,835.48 : x
  2. Step 2: Convert to fraction form
    20,787.98/28,687.44 = 11,835.48/x
  3. Step 3: Cross multiply
    20,787.98x = 28,687.44 × 11,835.48
  4. Step 4: Simplify right side
    20,787.98x = 339,529,622.37
  5. Step 5: Solve for x
    x = 339,529,622.37/20,787.98
  6. Step 6: Final answer
    x = 16,332.98

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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.