Home / 13,120.92-18,103.64-8,015.13

Finding the Fourth Proportional to 13,120.92, 18,103.64 and 8,015.13

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Solution

The fourth proportional to 13,120.92, 18,103.64 and 8,015.13 is: 11,058.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,120.92 : 18,103.64 = 8,015.13 : x
  2. Step 2: Convert to fraction form
    13,120.92/18,103.64 = 8,015.13/x
  3. Step 3: Cross multiply
    13,120.92x = 18,103.64 × 8,015.13
  4. Step 4: Simplify right side
    13,120.92x = 145,102,988.00
  5. Step 5: Solve for x
    x = 145,102,988.00/13,120.92
  6. Step 6: Final answer
    x = 11,058.90

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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.