Home / 13,410.24-20,109.12-7,865.28

Finding the Fourth Proportional to 13,410.24, 20,109.12 and 7,865.28

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Solution

The fourth proportional to 13,410.24, 20,109.12 and 7,865.28 is: 11,794.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,410.24 : 20,109.12 = 7,865.28 : x
  2. Step 2: Convert to fraction form
    13,410.24/20,109.12 = 7,865.28/x
  3. Step 3: Cross multiply
    13,410.24x = 20,109.12 × 7,865.28
  4. Step 4: Simplify right side
    13,410.24x = 158,163,859.35
  5. Step 5: Solve for x
    x = 158,163,859.35/13,410.24
  6. Step 6: Final answer
    x = 11,794.26

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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.