Home / 13,129.44-18,120.96-7,540.32

Finding the Fourth Proportional to 13,129.44, 18,120.96 and 7,540.32

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Solution

The fourth proportional to 13,129.44, 18,120.96 and 7,540.32 is: 10,406.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,129.44 : 18,120.96 = 7,540.32 : x
  2. Step 2: Convert to fraction form
    13,129.44/18,120.96 = 7,540.32/x
  3. Step 3: Cross multiply
    13,129.44x = 18,120.96 × 7,540.32
  4. Step 4: Simplify right side
    13,129.44x = 136,637,837.11
  5. Step 5: Solve for x
    x = 136,637,837.11/13,129.44
  6. Step 6: Final answer
    x = 10,406.98

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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.