Home / 14,378.25-21,568.59-3,990

Finding the Fourth Proportional to 14,378.25, 21,568.59 and 3,990

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Solution

The fourth proportional to 14,378.25, 21,568.59 and 3,990 is: 5,985.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,378.25 : 21,568.59 = 3,990 : x
  2. Step 2: Convert to fraction form
    14,378.25/21,568.59 = 3,990/x
  3. Step 3: Cross multiply
    14,378.25x = 21,568.59 × 3,990
  4. Step 4: Simplify right side
    14,378.25x = 86,058,674.10
  5. Step 5: Solve for x
    x = 86,058,674.10/14,378.25
  6. Step 6: Final answer
    x = 5,985.34

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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.