Home / 7,989.52-11,983.40-2,145.68

Finding the Fourth Proportional to 7,989.52, 11,983.40 and 2,145.68

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Solution

The fourth proportional to 7,989.52, 11,983.40 and 2,145.68 is: 3,218.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,989.52 : 11,983.40 = 2,145.68 : x
  2. Step 2: Convert to fraction form
    7,989.52/11,983.40 = 2,145.68/x
  3. Step 3: Cross multiply
    7,989.52x = 11,983.40 × 2,145.68
  4. Step 4: Simplify right side
    7,989.52x = 25,712,541.71
  5. Step 5: Solve for x
    x = 25,712,541.71/7,989.52
  6. Step 6: Final answer
    x = 3,218.28

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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.