Home / 18,421.72-27,628.56-5,270.56

Finding the Fourth Proportional to 18,421.72, 27,628.56 and 5,270.56

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Solution

The fourth proportional to 18,421.72, 27,628.56 and 5,270.56 is: 7,904.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,421.72 : 27,628.56 = 5,270.56 : x
  2. Step 2: Convert to fraction form
    18,421.72/27,628.56 = 5,270.56/x
  3. Step 3: Cross multiply
    18,421.72x = 27,628.56 × 5,270.56
  4. Step 4: Simplify right side
    18,421.72x = 145,617,983.19
  5. Step 5: Solve for x
    x = 145,617,983.19/18,421.72
  6. Step 6: Final answer
    x = 7,904.69

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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.