Home / 20,185.19-27,861.75-13,015.11

Finding the Fourth Proportional to 20,185.19, 27,861.75 and 13,015.11

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Solution

The fourth proportional to 20,185.19, 27,861.75 and 13,015.11 is: 17,964.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,185.19 : 27,861.75 = 13,015.11 : x
  2. Step 2: Convert to fraction form
    20,185.19/27,861.75 = 13,015.11/x
  3. Step 3: Cross multiply
    20,185.19x = 27,861.75 × 13,015.11
  4. Step 4: Simplify right side
    20,185.19x = 362,623,741.04
  5. Step 5: Solve for x
    x = 362,623,741.04/20,185.19
  6. Step 6: Final answer
    x = 17,964.85

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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.