Home / 7,131.51-9,841.23-3,987.63

Finding the Fourth Proportional to 7,131.51, 9,841.23 and 3,987.63

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Solution

The fourth proportional to 7,131.51, 9,841.23 and 3,987.63 is: 5,502.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,131.51 : 9,841.23 = 3,987.63 : x
  2. Step 2: Convert to fraction form
    7,131.51/9,841.23 = 3,987.63/x
  3. Step 3: Cross multiply
    7,131.51x = 9,841.23 × 3,987.63
  4. Step 4: Simplify right side
    7,131.51x = 39,243,183.98
  5. Step 5: Solve for x
    x = 39,243,183.98/7,131.51
  6. Step 6: Final answer
    x = 5,502.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.