Home / 13,200.09-18,205.34-9,416.58

Finding the Fourth Proportional to 13,200.09, 18,205.34 and 9,416.58

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Solution

The fourth proportional to 13,200.09, 18,205.34 and 9,416.58 is: 12,987.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,200.09 : 18,205.34 = 9,416.58 : x
  2. Step 2: Convert to fraction form
    13,200.09/18,205.34 = 9,416.58/x
  3. Step 3: Cross multiply
    13,200.09x = 18,205.34 × 9,416.58
  4. Step 4: Simplify right side
    13,200.09x = 171,431,993.45
  5. Step 5: Solve for x
    x = 171,431,993.45/13,200.09
  6. Step 6: Final answer
    x = 12,987.18

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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.