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Finding the Fourth Proportional to 20,993.13, 28,961.17 and 14,184.98

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Solution

The fourth proportional to 20,993.13, 28,961.17 and 14,184.98 is: 19,568.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,993.13 : 28,961.17 = 14,184.98 : x
  2. Step 2: Convert to fraction form
    20,993.13/28,961.17 = 14,184.98/x
  3. Step 3: Cross multiply
    20,993.13x = 28,961.17 × 14,184.98
  4. Step 4: Simplify right side
    20,993.13x = 410,813,617.23
  5. Step 5: Solve for x
    x = 410,813,617.23/20,993.13
  6. Step 6: Final answer
    x = 19,568.96

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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.