Home / 21,431.39-29,575.53-12,000.15

Finding the Fourth Proportional to 21,431.39, 29,575.53 and 12,000.15

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Solution

The fourth proportional to 21,431.39, 29,575.53 and 12,000.15 is: 16,560.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,431.39 : 29,575.53 = 12,000.15 : x
  2. Step 2: Convert to fraction form
    21,431.39/29,575.53 = 12,000.15/x
  3. Step 3: Cross multiply
    21,431.39x = 29,575.53 × 12,000.15
  4. Step 4: Simplify right side
    21,431.39x = 354,910,796.33
  5. Step 5: Solve for x
    x = 354,910,796.33/21,431.39
  6. Step 6: Final answer
    x = 16,560.33

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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.