Home / 5,418.75-8,128.14-1,314.75

Finding the Fourth Proportional to 5,418.75, 8,128.14 and 1,314.75

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Solution

The fourth proportional to 5,418.75, 8,128.14 and 1,314.75 is: 1,972.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,418.75 : 8,128.14 = 1,314.75 : x
  2. Step 2: Convert to fraction form
    5,418.75/8,128.14 = 1,314.75/x
  3. Step 3: Cross multiply
    5,418.75x = 8,128.14 × 1,314.75
  4. Step 4: Simplify right side
    5,418.75x = 10,686,472.07
  5. Step 5: Solve for x
    x = 10,686,472.07/5,418.75
  6. Step 6: Final answer
    x = 1,972.13

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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.