Home / 13,221.45-18,240.57-8,441.57

Finding the Fourth Proportional to 13,221.45, 18,240.57 and 8,441.57

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Solution

The fourth proportional to 13,221.45, 18,240.57 and 8,441.57 is: 11,646.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,221.45 : 18,240.57 = 8,441.57 : x
  2. Step 2: Convert to fraction form
    13,221.45/18,240.57 = 8,441.57/x
  3. Step 3: Cross multiply
    13,221.45x = 18,240.57 × 8,441.57
  4. Step 4: Simplify right side
    13,221.45x = 153,979,048.49
  5. Step 5: Solve for x
    x = 153,979,048.49/13,221.45
  6. Step 6: Final answer
    x = 11,646.15

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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.