Home / 20,910.03-28,855.89-11,479.20

Finding the Fourth Proportional to 20,910.03, 28,855.89 and 11,479.20

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Solution

The fourth proportional to 20,910.03, 28,855.89 and 11,479.20 is: 15,841.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,910.03 : 28,855.89 = 11,479.20 : x
  2. Step 2: Convert to fraction form
    20,910.03/28,855.89 = 11,479.20/x
  3. Step 3: Cross multiply
    20,910.03x = 28,855.89 × 11,479.20
  4. Step 4: Simplify right side
    20,910.03x = 331,242,532.49
  5. Step 5: Solve for x
    x = 331,242,532.49/20,910.03
  6. Step 6: Final answer
    x = 15,841.32

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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.