Home / 28,380.72-39,165.04-15,633.64

Finding the Fourth Proportional to 28,380.72, 39,165.04 and 15,633.64

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Solution

The fourth proportional to 28,380.72, 39,165.04 and 15,633.64 is: 21,574.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,380.72 : 39,165.04 = 15,633.64 : x
  2. Step 2: Convert to fraction form
    28,380.72/39,165.04 = 15,633.64/x
  3. Step 3: Cross multiply
    28,380.72x = 39,165.04 × 15,633.64
  4. Step 4: Simplify right side
    28,380.72x = 612,292,135.95
  5. Step 5: Solve for x
    x = 612,292,135.95/28,380.72
  6. Step 6: Final answer
    x = 21,574.23

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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.