Home / 21,160.85-29,191.39-13,507.76

Finding the Fourth Proportional to 21,160.85, 29,191.39 and 13,507.76

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Solution

The fourth proportional to 21,160.85, 29,191.39 and 13,507.76 is: 18,633.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,160.85 : 29,191.39 = 13,507.76 : x
  2. Step 2: Convert to fraction form
    21,160.85/29,191.39 = 13,507.76/x
  3. Step 3: Cross multiply
    21,160.85x = 29,191.39 × 13,507.76
  4. Step 4: Simplify right side
    21,160.85x = 394,310,329.40
  5. Step 5: Solve for x
    x = 394,310,329.40/21,160.85
  6. Step 6: Final answer
    x = 18,633.96

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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.