Home / 13,135.36-18,121.08-8,653.36

Finding the Fourth Proportional to 13,135.36, 18,121.08 and 8,653.36

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Solution

The fourth proportional to 13,135.36, 18,121.08 and 8,653.36 is: 11,937.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,135.36 : 18,121.08 = 8,653.36 : x
  2. Step 2: Convert to fraction form
    13,135.36/18,121.08 = 8,653.36/x
  3. Step 3: Cross multiply
    13,135.36x = 18,121.08 × 8,653.36
  4. Step 4: Simplify right side
    13,135.36x = 156,808,228.83
  5. Step 5: Solve for x
    x = 156,808,228.83/13,135.36
  6. Step 6: Final answer
    x = 11,937.87

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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.