Home / 18,620.47-27,931.38-6,140.80

Finding the Fourth Proportional to 18,620.47, 27,931.38 and 6,140.80

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Solution

The fourth proportional to 18,620.47, 27,931.38 and 6,140.80 is: 9,211.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,620.47 : 27,931.38 = 6,140.80 : x
  2. Step 2: Convert to fraction form
    18,620.47/27,931.38 = 6,140.80/x
  3. Step 3: Cross multiply
    18,620.47x = 27,931.38 × 6,140.80
  4. Step 4: Simplify right side
    18,620.47x = 171,521,018.30
  5. Step 5: Solve for x
    x = 171,521,018.30/18,620.47
  6. Step 6: Final answer
    x = 9,211.42

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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.