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Finding the Fourth Proportional to 18,666.30, 27,999.45 and 16,787.10

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Solution

The fourth proportional to 18,666.30, 27,999.45 and 16,787.10 is: 25,180.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,666.30 : 27,999.45 = 16,787.10 : x
  2. Step 2: Convert to fraction form
    18,666.30/27,999.45 = 16,787.10/x
  3. Step 3: Cross multiply
    18,666.30x = 27,999.45 × 16,787.10
  4. Step 4: Simplify right side
    18,666.30x = 470,029,567.10
  5. Step 5: Solve for x
    x = 470,029,567.10/18,666.30
  6. Step 6: Final answer
    x = 25,180.65

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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.