Home / 5,286.12-7,929.27-1,390.38

Finding the Fourth Proportional to 5,286.12, 7,929.27 and 1,390.38

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Solution

The fourth proportional to 5,286.12, 7,929.27 and 1,390.38 is: 2,085.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,286.12 : 7,929.27 = 1,390.38 : x
  2. Step 2: Convert to fraction form
    5,286.12/7,929.27 = 1,390.38/x
  3. Step 3: Cross multiply
    5,286.12x = 7,929.27 × 1,390.38
  4. Step 4: Simplify right side
    5,286.12x = 11,024,698.42
  5. Step 5: Solve for x
    x = 11,024,698.42/5,286.12
  6. Step 6: Final answer
    x = 2,085.59

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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.