Home / 13,139.64-18,131.11-7,475.11

Finding the Fourth Proportional to 13,139.64, 18,131.11 and 7,475.11

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Solution

The fourth proportional to 13,139.64, 18,131.11 and 7,475.11 is: 10,314.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,139.64 : 18,131.11 = 7,475.11 : x
  2. Step 2: Convert to fraction form
    13,139.64/18,131.11 = 7,475.11/x
  3. Step 3: Cross multiply
    13,139.64x = 18,131.11 × 7,475.11
  4. Step 4: Simplify right side
    13,139.64x = 135,531,977.66
  5. Step 5: Solve for x
    x = 135,531,977.66/13,139.64
  6. Step 6: Final answer
    x = 10,314.74

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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.