Home / 7,987.29-11,980.01-2,143.44

Finding the Fourth Proportional to 7,987.29, 11,980.01 and 2,143.44

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Solution

The fourth proportional to 7,987.29, 11,980.01 and 2,143.44 is: 3,214.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,987.29 : 11,980.01 = 2,143.44 : x
  2. Step 2: Convert to fraction form
    7,987.29/11,980.01 = 2,143.44/x
  3. Step 3: Cross multiply
    7,987.29x = 11,980.01 × 2,143.44
  4. Step 4: Simplify right side
    7,987.29x = 25,678,421.92
  5. Step 5: Solve for x
    x = 25,678,421.92/7,987.29
  6. Step 6: Final answer
    x = 3,214.91

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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.