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Finding the Fourth Proportional to 18,894.80, 28,221.29 and 17,113.21

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Solution

The fourth proportional to 18,894.80, 28,221.29 and 17,113.21 is: 25,560.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,894.80 : 28,221.29 = 17,113.21 : x
  2. Step 2: Convert to fraction form
    18,894.80/28,221.29 = 17,113.21/x
  3. Step 3: Cross multiply
    18,894.80x = 28,221.29 × 17,113.21
  4. Step 4: Simplify right side
    18,894.80x = 482,956,866.56
  5. Step 5: Solve for x
    x = 482,956,866.56/18,894.80
  6. Step 6: Final answer
    x = 25,560.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.