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Finding the Fourth Proportional to 19,888.80, 27,447.96 and 13,162.68

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Solution

The fourth proportional to 19,888.80, 27,447.96 and 13,162.68 is: 18,165.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,888.80 : 27,447.96 = 13,162.68 : x
  2. Step 2: Convert to fraction form
    19,888.80/27,447.96 = 13,162.68/x
  3. Step 3: Cross multiply
    19,888.80x = 27,447.96 × 13,162.68
  4. Step 4: Simplify right side
    19,888.80x = 361,288,714.13
  5. Step 5: Solve for x
    x = 361,288,714.13/19,888.80
  6. Step 6: Final answer
    x = 18,165.44

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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.