Home / 18,989.85-28,459.99-13,742.53

Finding the Fourth Proportional to 18,989.85, 28,459.99 and 13,742.53

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Solution

The fourth proportional to 18,989.85, 28,459.99 and 13,742.53 is: 20,595.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,989.85 : 28,459.99 = 13,742.53 : x
  2. Step 2: Convert to fraction form
    18,989.85/28,459.99 = 13,742.53/x
  3. Step 3: Cross multiply
    18,989.85x = 28,459.99 × 13,742.53
  4. Step 4: Simplify right side
    18,989.85x = 391,112,266.37
  5. Step 5: Solve for x
    x = 391,112,266.37/18,989.85
  6. Step 6: Final answer
    x = 20,595.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.