Home / 18,620.72-27,931.38-4,580.78

Finding the Fourth Proportional to 18,620.72, 27,931.38 and 4,580.78

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Solution

The fourth proportional to 18,620.72, 27,931.38 and 4,580.78 is: 6,871.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,620.72 : 27,931.38 = 4,580.78 : x
  2. Step 2: Convert to fraction form
    18,620.72/27,931.38 = 4,580.78/x
  3. Step 3: Cross multiply
    18,620.72x = 27,931.38 × 4,580.78
  4. Step 4: Simplify right side
    18,620.72x = 127,947,483.97
  5. Step 5: Solve for x
    x = 127,947,483.97/18,620.72
  6. Step 6: Final answer
    x = 6,871.24

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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.