Home / 5,218.90-7,821.42-1,928.96

Finding the Fourth Proportional to 5,218.90, 7,821.42 and 1,928.96

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Solution

The fourth proportional to 5,218.90, 7,821.42 and 1,928.96 is: 2,890.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,218.90 : 7,821.42 = 1,928.96 : x
  2. Step 2: Convert to fraction form
    5,218.90/7,821.42 = 1,928.96/x
  3. Step 3: Cross multiply
    5,218.90x = 7,821.42 × 1,928.96
  4. Step 4: Simplify right side
    5,218.90x = 15,087,206.32
  5. Step 5: Solve for x
    x = 15,087,206.32/5,218.90
  6. Step 6: Final answer
    x = 2,890.88

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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.