Home / 18,972.81-28,462.56-6,489.90

Finding the Fourth Proportional to 18,972.81, 28,462.56 and 6,489.90

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Solution

The fourth proportional to 18,972.81, 28,462.56 and 6,489.90 is: 9,735.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,972.81 : 28,462.56 = 6,489.90 : x
  2. Step 2: Convert to fraction form
    18,972.81/28,462.56 = 6,489.90/x
  3. Step 3: Cross multiply
    18,972.81x = 28,462.56 × 6,489.90
  4. Step 4: Simplify right side
    18,972.81x = 184,719,168.14
  5. Step 5: Solve for x
    x = 184,719,168.14/18,972.81
  6. Step 6: Final answer
    x = 9,735.99

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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.