Home / 13,187.88-18,174.72-10,816.20

Finding the Fourth Proportional to 13,187.88, 18,174.72 and 10,816.20

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Solution

The fourth proportional to 13,187.88, 18,174.72 and 10,816.20 is: 14,906.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,187.88 : 18,174.72 = 10,816.20 : x
  2. Step 2: Convert to fraction form
    13,187.88/18,174.72 = 10,816.20/x
  3. Step 3: Cross multiply
    13,187.88x = 18,174.72 × 10,816.20
  4. Step 4: Simplify right side
    13,187.88x = 196,581,406.46
  5. Step 5: Solve for x
    x = 196,581,406.46/13,187.88
  6. Step 6: Final answer
    x = 14,906.22

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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.