Home / 28,238.32-38,967.78-15,662.80

Finding the Fourth Proportional to 28,238.32, 38,967.78 and 15,662.80

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Solution

The fourth proportional to 28,238.32, 38,967.78 and 15,662.80 is: 21,614.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,238.32 : 38,967.78 = 15,662.80 : x
  2. Step 2: Convert to fraction form
    28,238.32/38,967.78 = 15,662.80/x
  3. Step 3: Cross multiply
    28,238.32x = 38,967.78 × 15,662.80
  4. Step 4: Simplify right side
    28,238.32x = 610,344,544.58
  5. Step 5: Solve for x
    x = 610,344,544.58/28,238.32
  6. Step 6: Final answer
    x = 21,614.05

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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.