Home / 21,431.56-29,575.66-12,000.12

Finding the Fourth Proportional to 21,431.56, 29,575.66 and 12,000.12

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Solution

The fourth proportional to 21,431.56, 29,575.66 and 12,000.12 is: 16,560.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,431.56 : 29,575.66 = 12,000.12 : x
  2. Step 2: Convert to fraction form
    21,431.56/29,575.66 = 12,000.12/x
  3. Step 3: Cross multiply
    21,431.56x = 29,575.66 × 12,000.12
  4. Step 4: Simplify right side
    21,431.56x = 354,911,469.08
  5. Step 5: Solve for x
    x = 354,911,469.08/21,431.56
  6. Step 6: Final answer
    x = 16,560.23

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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.