Home / 13,203.58-18,221.93-8,719.56

Finding the Fourth Proportional to 13,203.58, 18,221.93 and 8,719.56

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Solution

The fourth proportional to 13,203.58, 18,221.93 and 8,719.56 is: 12,033.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,203.58 : 18,221.93 = 8,719.56 : x
  2. Step 2: Convert to fraction form
    13,203.58/18,221.93 = 8,719.56/x
  3. Step 3: Cross multiply
    13,203.58x = 18,221.93 × 8,719.56
  4. Step 4: Simplify right side
    13,203.58x = 158,887,211.95
  5. Step 5: Solve for x
    x = 158,887,211.95/13,203.58
  6. Step 6: Final answer
    x = 12,033.65

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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.