Home / 13,170.80-18,175.92-7,866.08

Finding the Fourth Proportional to 13,170.80, 18,175.92 and 7,866.08

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Solution

The fourth proportional to 13,170.80, 18,175.92 and 7,866.08 is: 10,855.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,170.80 : 18,175.92 = 7,866.08 : x
  2. Step 2: Convert to fraction form
    13,170.80/18,175.92 = 7,866.08/x
  3. Step 3: Cross multiply
    13,170.80x = 18,175.92 × 7,866.08
  4. Step 4: Simplify right side
    13,170.80x = 142,973,240.79
  5. Step 5: Solve for x
    x = 142,973,240.79/13,170.80
  6. Step 6: Final answer
    x = 10,855.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.