Home / 5,215.62-7,823.43-1,320.03

Finding the Fourth Proportional to 5,215.62, 7,823.43 and 1,320.03

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Solution

The fourth proportional to 5,215.62, 7,823.43 and 1,320.03 is: 1,980.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,215.62 : 7,823.43 = 1,320.03 : x
  2. Step 2: Convert to fraction form
    5,215.62/7,823.43 = 1,320.03/x
  3. Step 3: Cross multiply
    5,215.62x = 7,823.43 × 1,320.03
  4. Step 4: Simplify right side
    5,215.62x = 10,327,162.30
  5. Step 5: Solve for x
    x = 10,327,162.30/5,215.62
  6. Step 6: Final answer
    x = 1,980.05

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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.