Home / 3,128.32-4,697.34-2,989.81

Finding the Fourth Proportional to 3,128.32, 4,697.34 and 2,989.81

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Solution

The fourth proportional to 3,128.32, 4,697.34 and 2,989.81 is: 4,489.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.32 : 4,697.34 = 2,989.81 : x
  2. Step 2: Convert to fraction form
    3,128.32/4,697.34 = 2,989.81/x
  3. Step 3: Cross multiply
    3,128.32x = 4,697.34 × 2,989.81
  4. Step 4: Simplify right side
    3,128.32x = 14,044,154.11
  5. Step 5: Solve for x
    x = 14,044,154.11/3,128.32
  6. Step 6: Final answer
    x = 4,489.36

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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.