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Finding the Fourth Proportional to 13,666.65, 18,860.13 and 8,000.16

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Solution

The fourth proportional to 13,666.65, 18,860.13 and 8,000.16 is: 11,040.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,666.65 : 18,860.13 = 8,000.16 : x
  2. Step 2: Convert to fraction form
    13,666.65/18,860.13 = 8,000.16/x
  3. Step 3: Cross multiply
    13,666.65x = 18,860.13 × 8,000.16
  4. Step 4: Simplify right side
    13,666.65x = 150,884,057.62
  5. Step 5: Solve for x
    x = 150,884,057.62/13,666.65
  6. Step 6: Final answer
    x = 11,040.31

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1.5x scale

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.