Home / 20,965.45-31,450.38-10,438.08

Finding the Fourth Proportional to 20,965.45, 31,450.38 and 10,438.08

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Solution

The fourth proportional to 20,965.45, 31,450.38 and 10,438.08 is: 15,658.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,965.45 : 31,450.38 = 10,438.08 : x
  2. Step 2: Convert to fraction form
    20,965.45/31,450.38 = 10,438.08/x
  3. Step 3: Cross multiply
    20,965.45x = 31,450.38 × 10,438.08
  4. Step 4: Simplify right side
    20,965.45x = 328,281,556.38
  5. Step 5: Solve for x
    x = 328,281,556.38/20,965.45
  6. Step 6: Final answer
    x = 15,658.22

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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.