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Finding the Fourth Proportional to 18,505.96, 25,530.66 and 13,459.12

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Solution

The fourth proportional to 18,505.96, 25,530.66 and 13,459.12 is: 18,568.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,505.96 : 25,530.66 = 13,459.12 : x
  2. Step 2: Convert to fraction form
    18,505.96/25,530.66 = 13,459.12/x
  3. Step 3: Cross multiply
    18,505.96x = 25,530.66 × 13,459.12
  4. Step 4: Simplify right side
    18,505.96x = 343,620,216.62
  5. Step 5: Solve for x
    x = 343,620,216.62/18,505.96
  6. Step 6: Final answer
    x = 18,568.08

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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.