Home / 7,989.72-11,983.77-2,145.57

Finding the Fourth Proportional to 7,989.72, 11,983.77 and 2,145.57

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Solution

The fourth proportional to 7,989.72, 11,983.77 and 2,145.57 is: 3,218.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,989.72 : 11,983.77 = 2,145.57 : x
  2. Step 2: Convert to fraction form
    7,989.72/11,983.77 = 2,145.57/x
  3. Step 3: Cross multiply
    7,989.72x = 11,983.77 × 2,145.57
  4. Step 4: Simplify right side
    7,989.72x = 25,712,017.40
  5. Step 5: Solve for x
    x = 25,712,017.40/7,989.72
  6. Step 6: Final answer
    x = 3,218.14

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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.