Home / 5,390.20-8,085.80-1,927.48

Finding the Fourth Proportional to 5,390.20, 8,085.80 and 1,927.48

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Solution

The fourth proportional to 5,390.20, 8,085.80 and 1,927.48 is: 2,891.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,390.20 : 8,085.80 = 1,927.48 : x
  2. Step 2: Convert to fraction form
    5,390.20/8,085.80 = 1,927.48/x
  3. Step 3: Cross multiply
    5,390.20x = 8,085.80 × 1,927.48
  4. Step 4: Simplify right side
    5,390.20x = 15,585,217.78
  5. Step 5: Solve for x
    x = 15,585,217.78/5,390.20
  6. Step 6: Final answer
    x = 2,891.40

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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.