Home / 12,880.80-19,315.80-4,113.36

Finding the Fourth Proportional to 12,880.80, 19,315.80 and 4,113.36

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Solution

The fourth proportional to 12,880.80, 19,315.80 and 4,113.36 is: 6,168.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,880.80 : 19,315.80 = 4,113.36 : x
  2. Step 2: Convert to fraction form
    12,880.80/19,315.80 = 4,113.36/x
  3. Step 3: Cross multiply
    12,880.80x = 19,315.80 × 4,113.36
  4. Step 4: Simplify right side
    12,880.80x = 79,452,839.09
  5. Step 5: Solve for x
    x = 79,452,839.09/12,880.80
  6. Step 6: Final answer
    x = 6,168.32

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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.