Home / 10,855.22-14,979.96-6,139.40

Finding the Fourth Proportional to 10,855.22, 14,979.96 and 6,139.40

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Solution

The fourth proportional to 10,855.22, 14,979.96 and 6,139.40 is: 8,472.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,855.22 : 14,979.96 = 6,139.40 : x
  2. Step 2: Convert to fraction form
    10,855.22/14,979.96 = 6,139.40/x
  3. Step 3: Cross multiply
    10,855.22x = 14,979.96 × 6,139.40
  4. Step 4: Simplify right side
    10,855.22x = 91,967,891.52
  5. Step 5: Solve for x
    x = 91,967,891.52/10,855.22
  6. Step 6: Final answer
    x = 8,472.23

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.