Home / 13,725.32-18,931.20-11,620.31

Finding the Fourth Proportional to 13,725.32, 18,931.20 and 11,620.31

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Solution

The fourth proportional to 13,725.32, 18,931.20 and 11,620.31 is: 16,027.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,725.32 : 18,931.20 = 11,620.31 : x
  2. Step 2: Convert to fraction form
    13,725.32/18,931.20 = 11,620.31/x
  3. Step 3: Cross multiply
    13,725.32x = 18,931.20 × 11,620.31
  4. Step 4: Simplify right side
    13,725.32x = 219,986,412.67
  5. Step 5: Solve for x
    x = 219,986,412.67/13,725.32
  6. Step 6: Final answer
    x = 16,027.78

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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.