Home / 3,989.48-5,980.08-1,356.12

Finding the Fourth Proportional to 3,989.48, 5,980.08 and 1,356.12

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Solution

The fourth proportional to 3,989.48, 5,980.08 and 1,356.12 is: 2,032.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,989.48 : 5,980.08 = 1,356.12 : x
  2. Step 2: Convert to fraction form
    3,989.48/5,980.08 = 1,356.12/x
  3. Step 3: Cross multiply
    3,989.48x = 5,980.08 × 1,356.12
  4. Step 4: Simplify right side
    3,989.48x = 8,109,706.09
  5. Step 5: Solve for x
    x = 8,109,706.09/3,989.48
  6. Step 6: Final answer
    x = 2,032.77

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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.