Home / 28,140.40-38,832.36-15,392.88

Finding the Fourth Proportional to 28,140.40, 38,832.36 and 15,392.88

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Solution

The fourth proportional to 28,140.40, 38,832.36 and 15,392.88 is: 21,241.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,140.40 : 38,832.36 = 15,392.88 : x
  2. Step 2: Convert to fraction form
    28,140.40/38,832.36 = 15,392.88/x
  3. Step 3: Cross multiply
    28,140.40x = 38,832.36 × 15,392.88
  4. Step 4: Simplify right side
    28,140.40x = 597,741,857.60
  5. Step 5: Solve for x
    x = 597,741,857.60/28,140.40
  6. Step 6: Final answer
    x = 21,241.41

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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.