Home / 18,311.37-27,468.43-7,780.21

Finding the Fourth Proportional to 18,311.37, 27,468.43 and 7,780.21

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Solution

The fourth proportional to 18,311.37, 27,468.43 and 7,780.21 is: 11,670.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,311.37 : 27,468.43 = 7,780.21 : x
  2. Step 2: Convert to fraction form
    18,311.37/27,468.43 = 7,780.21/x
  3. Step 3: Cross multiply
    18,311.37x = 27,468.43 × 7,780.21
  4. Step 4: Simplify right side
    18,311.37x = 213,710,153.77
  5. Step 5: Solve for x
    x = 213,710,153.77/18,311.37
  6. Step 6: Final answer
    x = 11,670.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.