Home / 28,431.90-39,234.26-15,685.25

Finding the Fourth Proportional to 28,431.90, 39,234.26 and 15,685.25

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Solution

The fourth proportional to 28,431.90, 39,234.26 and 15,685.25 is: 21,644.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,431.90 : 39,234.26 = 15,685.25 : x
  2. Step 2: Convert to fraction form
    28,431.90/39,234.26 = 15,685.25/x
  3. Step 3: Cross multiply
    28,431.90x = 39,234.26 × 15,685.25
  4. Step 4: Simplify right side
    28,431.90x = 615,398,902.07
  5. Step 5: Solve for x
    x = 615,398,902.07/28,431.90
  6. Step 6: Final answer
    x = 21,644.66

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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.