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Finding the Fourth Proportional to 18,386.10, 27,579.15 and 10,998.90

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Solution

The fourth proportional to 18,386.10, 27,579.15 and 10,998.90 is: 16,498.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,386.10 : 27,579.15 = 10,998.90 : x
  2. Step 2: Convert to fraction form
    18,386.10/27,579.15 = 10,998.90/x
  3. Step 3: Cross multiply
    18,386.10x = 27,579.15 × 10,998.90
  4. Step 4: Simplify right side
    18,386.10x = 303,340,312.94
  5. Step 5: Solve for x
    x = 303,340,312.94/18,386.10
  6. Step 6: Final answer
    x = 16,498.35

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Similar ratio
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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.