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Finding the Fourth Proportional to 14,448.78, 19,939.68 and 8,161.16

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Solution

The fourth proportional to 14,448.78, 19,939.68 and 8,161.16 is: 11,262.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,448.78 : 19,939.68 = 8,161.16 : x
  2. Step 2: Convert to fraction form
    14,448.78/19,939.68 = 8,161.16/x
  3. Step 3: Cross multiply
    14,448.78x = 19,939.68 × 8,161.16
  4. Step 4: Simplify right side
    14,448.78x = 162,730,819.13
  5. Step 5: Solve for x
    x = 162,730,819.13/14,448.78
  6. Step 6: Final answer
    x = 11,262.60

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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.