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Finding the Fourth Proportional to 18,710.45, 28,065.44 and 5,383.77

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Solution

The fourth proportional to 18,710.45, 28,065.44 and 5,383.77 is: 8,075.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,710.45 : 28,065.44 = 5,383.77 : x
  2. Step 2: Convert to fraction form
    18,710.45/28,065.44 = 5,383.77/x
  3. Step 3: Cross multiply
    18,710.45x = 28,065.44 × 5,383.77
  4. Step 4: Simplify right side
    18,710.45x = 151,097,846.99
  5. Step 5: Solve for x
    x = 151,097,846.99/18,710.45
  6. Step 6: Final answer
    x = 8,075.59

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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.