Home / 28,375.72-39,158.12-15,628.66

Finding the Fourth Proportional to 28,375.72, 39,158.12 and 15,628.66

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Solution

The fourth proportional to 28,375.72, 39,158.12 and 15,628.66 is: 21,567.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,375.72 : 39,158.12 = 15,628.66 : x
  2. Step 2: Convert to fraction form
    28,375.72/39,158.12 = 15,628.66/x
  3. Step 3: Cross multiply
    28,375.72x = 39,158.12 × 15,628.66
  4. Step 4: Simplify right side
    28,375.72x = 611,988,884.90
  5. Step 5: Solve for x
    x = 611,988,884.90/28,375.72
  6. Step 6: Final answer
    x = 21,567.34

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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.