Home / 20,524.32-28,304.64-15,399.36

Finding the Fourth Proportional to 20,524.32, 28,304.64 and 15,399.36

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Solution

The fourth proportional to 20,524.32, 28,304.64 and 15,399.36 is: 21,236.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,524.32 : 28,304.64 = 15,399.36 : x
  2. Step 2: Convert to fraction form
    20,524.32/28,304.64 = 15,399.36/x
  3. Step 3: Cross multiply
    20,524.32x = 28,304.64 × 15,399.36
  4. Step 4: Simplify right side
    20,524.32x = 435,873,341.03
  5. Step 5: Solve for x
    x = 435,873,341.03/20,524.32
  6. Step 6: Final answer
    x = 21,236.92

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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.