Home / 20,408.70-28,163.55-11,455.98

Finding the Fourth Proportional to 20,408.70, 28,163.55 and 11,455.98

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Solution

The fourth proportional to 20,408.70, 28,163.55 and 11,455.98 is: 15,809.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,408.70 : 28,163.55 = 11,455.98 : x
  2. Step 2: Convert to fraction form
    20,408.70/28,163.55 = 11,455.98/x
  3. Step 3: Cross multiply
    20,408.70x = 28,163.55 × 11,455.98
  4. Step 4: Simplify right side
    20,408.70x = 322,641,065.53
  5. Step 5: Solve for x
    x = 322,641,065.53/20,408.70
  6. Step 6: Final answer
    x = 15,809.00

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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.