Home / 18,910.60-28,357.53-7,215.64

Finding the Fourth Proportional to 18,910.60, 28,357.53 and 7,215.64

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Solution

The fourth proportional to 18,910.60, 28,357.53 and 7,215.64 is: 10,820.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,910.60 : 28,357.53 = 7,215.64 : x
  2. Step 2: Convert to fraction form
    18,910.60/28,357.53 = 7,215.64/x
  3. Step 3: Cross multiply
    18,910.60x = 28,357.53 × 7,215.64
  4. Step 4: Simplify right side
    18,910.60x = 204,617,727.77
  5. Step 5: Solve for x
    x = 204,617,727.77/18,910.60
  6. Step 6: Final answer
    x = 10,820.27

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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.