Home / 21,325.70-31,950.24-12,555.83

Finding the Fourth Proportional to 21,325.70, 31,950.24 and 12,555.83

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Solution

The fourth proportional to 21,325.70, 31,950.24 and 12,555.83 is: 18,811.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,325.70 : 31,950.24 = 12,555.83 : x
  2. Step 2: Convert to fraction form
    21,325.70/31,950.24 = 12,555.83/x
  3. Step 3: Cross multiply
    21,325.70x = 31,950.24 × 12,555.83
  4. Step 4: Simplify right side
    21,325.70x = 401,161,559.37
  5. Step 5: Solve for x
    x = 401,161,559.37/21,325.70
  6. Step 6: Final answer
    x = 18,811.18

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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.