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Finding the Fourth Proportional to 18,716.20, 28,074.30 and 16,412.20

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Solution

The fourth proportional to 18,716.20, 28,074.30 and 16,412.20 is: 24,618.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,716.20 : 28,074.30 = 16,412.20 : x
  2. Step 2: Convert to fraction form
    18,716.20/28,074.30 = 16,412.20/x
  3. Step 3: Cross multiply
    18,716.20x = 28,074.30 × 16,412.20
  4. Step 4: Simplify right side
    18,716.20x = 460,761,026.46
  5. Step 5: Solve for x
    x = 460,761,026.46/18,716.20
  6. Step 6: Final answer
    x = 24,618.30

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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.