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Finding the Fourth Proportional to 14,019.12, 21,021.48 and 8,187.12

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Solution

The fourth proportional to 14,019.12, 21,021.48 and 8,187.12 is: 12,276.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,019.12 : 21,021.48 = 8,187.12 : x
  2. Step 2: Convert to fraction form
    14,019.12/21,021.48 = 8,187.12/x
  3. Step 3: Cross multiply
    14,019.12x = 21,021.48 × 8,187.12
  4. Step 4: Simplify right side
    14,019.12x = 172,105,379.34
  5. Step 5: Solve for x
    x = 172,105,379.34/14,019.12
  6. Step 6: Final answer
    x = 12,276.48

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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.