Home / 18,289.96-27,431.64-5,139.12

Finding the Fourth Proportional to 18,289.96, 27,431.64 and 5,139.12

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Solution

The fourth proportional to 18,289.96, 27,431.64 and 5,139.12 is: 7,707.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,289.96 : 27,431.64 = 5,139.12 : x
  2. Step 2: Convert to fraction form
    18,289.96/27,431.64 = 5,139.12/x
  3. Step 3: Cross multiply
    18,289.96x = 27,431.64 × 5,139.12
  4. Step 4: Simplify right side
    18,289.96x = 140,974,489.76
  5. Step 5: Solve for x
    x = 140,974,489.76/18,289.96
  6. Step 6: Final answer
    x = 7,707.75

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1.5x scale

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.