Home / 20,519.14-28,316.40-11,087.68

Finding the Fourth Proportional to 20,519.14, 28,316.40 and 11,087.68

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Solution

The fourth proportional to 20,519.14, 28,316.40 and 11,087.68 is: 15,300.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,519.14 : 28,316.40 = 11,087.68 : x
  2. Step 2: Convert to fraction form
    20,519.14/28,316.40 = 11,087.68/x
  3. Step 3: Cross multiply
    20,519.14x = 28,316.40 × 11,087.68
  4. Step 4: Simplify right side
    20,519.14x = 313,963,181.95
  5. Step 5: Solve for x
    x = 313,963,181.95/20,519.14
  6. Step 6: Final answer
    x = 15,300.99

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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.