Home / 28,434.93-39,238.34-15,687.42

Finding the Fourth Proportional to 28,434.93, 39,238.34 and 15,687.42

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Solution

The fourth proportional to 28,434.93, 39,238.34 and 15,687.42 is: 21,647.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,434.93 : 39,238.34 = 15,687.42 : x
  2. Step 2: Convert to fraction form
    28,434.93/39,238.34 = 15,687.42/x
  3. Step 3: Cross multiply
    28,434.93x = 39,238.34 × 15,687.42
  4. Step 4: Simplify right side
    28,434.93x = 615,548,241.25
  5. Step 5: Solve for x
    x = 615,548,241.25/28,434.93
  6. Step 6: Final answer
    x = 21,647.61

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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.