Home / 13,189.90-18,210.56-11,771.16

Finding the Fourth Proportional to 13,189.90, 18,210.56 and 11,771.16

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Solution

The fourth proportional to 13,189.90, 18,210.56 and 11,771.16 is: 16,251.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,189.90 : 18,210.56 = 11,771.16 : x
  2. Step 2: Convert to fraction form
    13,189.90/18,210.56 = 11,771.16/x
  3. Step 3: Cross multiply
    13,189.90x = 18,210.56 × 11,771.16
  4. Step 4: Simplify right side
    13,189.90x = 214,359,415.45
  5. Step 5: Solve for x
    x = 214,359,415.45/13,189.90
  6. Step 6: Final answer
    x = 16,251.78

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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.