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Finding the Fourth Proportional to 28,966.80, 43,401.60 and 14,143.80

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Solution

The fourth proportional to 28,966.80, 43,401.60 and 14,143.80 is: 21,191.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,966.80 : 43,401.60 = 14,143.80 : x
  2. Step 2: Convert to fraction form
    28,966.80/43,401.60 = 14,143.80/x
  3. Step 3: Cross multiply
    28,966.80x = 43,401.60 × 14,143.80
  4. Step 4: Simplify right side
    28,966.80x = 613,863,550.08
  5. Step 5: Solve for x
    x = 613,863,550.08/28,966.80
  6. Step 6: Final answer
    x = 21,191.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.