Home / 20,868.58-31,302.93-5,286.19

Finding the Fourth Proportional to 20,868.58, 31,302.93 and 5,286.19

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Solution

The fourth proportional to 20,868.58, 31,302.93 and 5,286.19 is: 7,929.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,868.58 : 31,302.93 = 5,286.19 : x
  2. Step 2: Convert to fraction form
    20,868.58/31,302.93 = 5,286.19/x
  3. Step 3: Cross multiply
    20,868.58x = 31,302.93 × 5,286.19
  4. Step 4: Simplify right side
    20,868.58x = 165,473,235.54
  5. Step 5: Solve for x
    x = 165,473,235.54/20,868.58
  6. Step 6: Final answer
    x = 7,929.30

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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.