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Finding the Fourth Proportional to 13,653.54, 20,448.48 and 13,279.71

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Solution

The fourth proportional to 13,653.54, 20,448.48 and 13,279.71 is: 19,888.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,653.54 : 20,448.48 = 13,279.71 : x
  2. Step 2: Convert to fraction form
    13,653.54/20,448.48 = 13,279.71/x
  3. Step 3: Cross multiply
    13,653.54x = 20,448.48 × 13,279.71
  4. Step 4: Simplify right side
    13,653.54x = 271,549,884.34
  5. Step 5: Solve for x
    x = 271,549,884.34/13,653.54
  6. Step 6: Final answer
    x = 19,888.61

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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.