Home / 13,081.20-19,621.80-11,007.60

Finding the Fourth Proportional to 13,081.20, 19,621.80 and 11,007.60

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Solution

The fourth proportional to 13,081.20, 19,621.80 and 11,007.60 is: 16,511.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,081.20 : 19,621.80 = 11,007.60 : x
  2. Step 2: Convert to fraction form
    13,081.20/19,621.80 = 11,007.60/x
  3. Step 3: Cross multiply
    13,081.20x = 19,621.80 × 11,007.60
  4. Step 4: Simplify right side
    13,081.20x = 215,988,925.68
  5. Step 5: Solve for x
    x = 215,988,925.68/13,081.20
  6. Step 6: Final answer
    x = 16,511.40

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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.