Home / 20,849.16-28,771.88-11,289.15

Finding the Fourth Proportional to 20,849.16, 28,771.88 and 11,289.15

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Solution

The fourth proportional to 20,849.16, 28,771.88 and 11,289.15 is: 15,579.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,849.16 : 28,771.88 = 11,289.15 : x
  2. Step 2: Convert to fraction form
    20,849.16/28,771.88 = 11,289.15/x
  3. Step 3: Cross multiply
    20,849.16x = 28,771.88 × 11,289.15
  4. Step 4: Simplify right side
    20,849.16x = 324,810,069.10
  5. Step 5: Solve for x
    x = 324,810,069.10/20,849.16
  6. Step 6: Final answer
    x = 15,579.05

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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.