Home / 18,867.61-28,299.78-6,387.36

Finding the Fourth Proportional to 18,867.61, 28,299.78 and 6,387.36

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Solution

The fourth proportional to 18,867.61, 28,299.78 and 6,387.36 is: 9,580.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,867.61 : 28,299.78 = 6,387.36 : x
  2. Step 2: Convert to fraction form
    18,867.61/28,299.78 = 6,387.36/x
  3. Step 3: Cross multiply
    18,867.61x = 28,299.78 × 6,387.36
  4. Step 4: Simplify right side
    18,867.61x = 180,760,882.78
  5. Step 5: Solve for x
    x = 180,760,882.78/18,867.61
  6. Step 6: Final answer
    x = 9,580.49

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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.