Home / 21,110.45-29,129.87-12,160.85

Finding the Fourth Proportional to 21,110.45, 29,129.87 and 12,160.85

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Solution

The fourth proportional to 21,110.45, 29,129.87 and 12,160.85 is: 16,780.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,110.45 : 29,129.87 = 12,160.85 : x
  2. Step 2: Convert to fraction form
    21,110.45/29,129.87 = 12,160.85/x
  3. Step 3: Cross multiply
    21,110.45x = 29,129.87 × 12,160.85
  4. Step 4: Simplify right side
    21,110.45x = 354,243,773.14
  5. Step 5: Solve for x
    x = 354,243,773.14/21,110.45
  6. Step 6: Final answer
    x = 16,780.50

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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.