Home / 13,139.64-18,129.24-7,474.44

Finding the Fourth Proportional to 13,139.64, 18,129.24 and 7,474.44

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Solution

The fourth proportional to 13,139.64, 18,129.24 and 7,474.44 is: 10,312.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,139.64 : 18,129.24 = 7,474.44 : x
  2. Step 2: Convert to fraction form
    13,139.64/18,129.24 = 7,474.44/x
  3. Step 3: Cross multiply
    13,139.64x = 18,129.24 × 7,474.44
  4. Step 4: Simplify right side
    13,139.64x = 135,505,916.63
  5. Step 5: Solve for x
    x = 135,505,916.63/13,139.64
  6. Step 6: Final answer
    x = 10,312.76

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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.