Home / 13,200.24-18,208.80-8,479.20

Finding the Fourth Proportional to 13,200.24, 18,208.80 and 8,479.20

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Solution

The fourth proportional to 13,200.24, 18,208.80 and 8,479.20 is: 11,696.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,200.24 : 18,208.80 = 8,479.20 : x
  2. Step 2: Convert to fraction form
    13,200.24/18,208.80 = 8,479.20/x
  3. Step 3: Cross multiply
    13,200.24x = 18,208.80 × 8,479.20
  4. Step 4: Simplify right side
    13,200.24x = 154,396,056.96
  5. Step 5: Solve for x
    x = 154,396,056.96/13,200.24
  6. Step 6: Final answer
    x = 11,696.46

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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.