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Finding the Fourth Proportional to 13,338.55, 18,415.79 and 8,560.55

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Solution

The fourth proportional to 13,338.55, 18,415.79 and 8,560.55 is: 11,819.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,338.55 : 18,415.79 = 8,560.55 : x
  2. Step 2: Convert to fraction form
    13,338.55/18,415.79 = 8,560.55/x
  3. Step 3: Cross multiply
    13,338.55x = 18,415.79 × 8,560.55
  4. Step 4: Simplify right side
    13,338.55x = 157,649,326.42
  5. Step 5: Solve for x
    x = 157,649,326.42/13,338.55
  6. Step 6: Final answer
    x = 11,819.07

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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.