Home / 13,055.18-18,015.86-7,389.81

Finding the Fourth Proportional to 13,055.18, 18,015.86 and 7,389.81

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Solution

The fourth proportional to 13,055.18, 18,015.86 and 7,389.81 is: 10,197.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,055.18 : 18,015.86 = 7,389.81 : x
  2. Step 2: Convert to fraction form
    13,055.18/18,015.86 = 7,389.81/x
  3. Step 3: Cross multiply
    13,055.18x = 18,015.86 × 7,389.81
  4. Step 4: Simplify right side
    13,055.18x = 133,133,745.44
  5. Step 5: Solve for x
    x = 133,133,745.44/13,055.18
  6. Step 6: Final answer
    x = 10,197.78

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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.