Home / 5,390.16-8,085.36-1,927.68

Finding the Fourth Proportional to 5,390.16, 8,085.36 and 1,927.68

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Solution

The fourth proportional to 5,390.16, 8,085.36 and 1,927.68 is: 2,891.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,390.16 : 8,085.36 = 1,927.68 : x
  2. Step 2: Convert to fraction form
    5,390.16/8,085.36 = 1,927.68/x
  3. Step 3: Cross multiply
    5,390.16x = 8,085.36 × 1,927.68
  4. Step 4: Simplify right side
    5,390.16x = 15,585,986.76
  5. Step 5: Solve for x
    x = 15,585,986.76/5,390.16
  6. Step 6: Final answer
    x = 2,891.56

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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.