Home / 3,989.80-5,985.24-1,392.04

Finding the Fourth Proportional to 3,989.80, 5,985.24 and 1,392.04

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Solution

The fourth proportional to 3,989.80, 5,985.24 and 1,392.04 is: 2,088.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,989.80 : 5,985.24 = 1,392.04 : x
  2. Step 2: Convert to fraction form
    3,989.80/5,985.24 = 1,392.04/x
  3. Step 3: Cross multiply
    3,989.80x = 5,985.24 × 1,392.04
  4. Step 4: Simplify right side
    3,989.80x = 8,331,693.49
  5. Step 5: Solve for x
    x = 8,331,693.49/3,989.80
  6. Step 6: Final answer
    x = 2,088.25

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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.