Home / 21,103.38-29,121.72-12,148.98

Finding the Fourth Proportional to 21,103.38, 29,121.72 and 12,148.98

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Solution

The fourth proportional to 21,103.38, 29,121.72 and 12,148.98 is: 16,765.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,103.38 : 29,121.72 = 12,148.98 : x
  2. Step 2: Convert to fraction form
    21,103.38/29,121.72 = 12,148.98/x
  3. Step 3: Cross multiply
    21,103.38x = 29,121.72 × 12,148.98
  4. Step 4: Simplify right side
    21,103.38x = 353,799,193.85
  5. Step 5: Solve for x
    x = 353,799,193.85/21,103.38
  6. Step 6: Final answer
    x = 16,765.05

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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.