Home / 28,380.64-39,165.24-15,808.36

Finding the Fourth Proportional to 28,380.64, 39,165.24 and 15,808.36

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Solution

The fourth proportional to 28,380.64, 39,165.24 and 15,808.36 is: 21,815.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,380.64 : 39,165.24 = 15,808.36 : x
  2. Step 2: Convert to fraction form
    28,380.64/39,165.24 = 15,808.36/x
  3. Step 3: Cross multiply
    28,380.64x = 39,165.24 × 15,808.36
  4. Step 4: Simplify right side
    28,380.64x = 619,138,213.41
  5. Step 5: Solve for x
    x = 619,138,213.41/28,380.64
  6. Step 6: Final answer
    x = 21,815.51

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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.