Home / 5,215.12-7,814.91-4,721.23

Finding the Fourth Proportional to 5,215.12, 7,814.91 and 4,721.23

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Solution

The fourth proportional to 5,215.12, 7,814.91 and 4,721.23 is: 7,074.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,215.12 : 7,814.91 = 4,721.23 : x
  2. Step 2: Convert to fraction form
    5,215.12/7,814.91 = 4,721.23/x
  3. Step 3: Cross multiply
    5,215.12x = 7,814.91 × 4,721.23
  4. Step 4: Simplify right side
    5,215.12x = 36,895,987.54
  5. Step 5: Solve for x
    x = 36,895,987.54/5,215.12
  6. Step 6: Final answer
    x = 7,074.81

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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.