Home / 18,619.47-27,929.88-6,139.80

Finding the Fourth Proportional to 18,619.47, 27,929.88 and 6,139.80

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Solution

The fourth proportional to 18,619.47, 27,929.88 and 6,139.80 is: 9,209.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,619.47 : 27,929.88 = 6,139.80 : x
  2. Step 2: Convert to fraction form
    18,619.47/27,929.88 = 6,139.80/x
  3. Step 3: Cross multiply
    18,619.47x = 27,929.88 × 6,139.80
  4. Step 4: Simplify right side
    18,619.47x = 171,483,877.22
  5. Step 5: Solve for x
    x = 171,483,877.22/18,619.47
  6. Step 6: Final answer
    x = 9,209.92

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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.