Home / 21,789.32-30,078.40-14,725.32

Finding the Fourth Proportional to 21,789.32, 30,078.40 and 14,725.32

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Solution

The fourth proportional to 21,789.32, 30,078.40 and 14,725.32 is: 20,327.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,789.32 : 30,078.40 = 14,725.32 : x
  2. Step 2: Convert to fraction form
    21,789.32/30,078.40 = 14,725.32/x
  3. Step 3: Cross multiply
    21,789.32x = 30,078.40 × 14,725.32
  4. Step 4: Simplify right side
    21,789.32x = 442,914,065.09
  5. Step 5: Solve for x
    x = 442,914,065.09/21,789.32
  6. Step 6: Final answer
    x = 20,327.12

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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.