Home / 13,979.52-21,003.84-12,320.64

Finding the Fourth Proportional to 13,979.52, 21,003.84 and 12,320.64

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Solution

The fourth proportional to 13,979.52, 21,003.84 and 12,320.64 is: 18,511.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,979.52 : 21,003.84 = 12,320.64 : x
  2. Step 2: Convert to fraction form
    13,979.52/21,003.84 = 12,320.64/x
  3. Step 3: Cross multiply
    13,979.52x = 21,003.84 × 12,320.64
  4. Step 4: Simplify right side
    13,979.52x = 258,780,751.26
  5. Step 5: Solve for x
    x = 258,780,751.26/13,979.52
  6. Step 6: Final answer
    x = 18,511.42

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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.