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Finding the Fourth Proportional to 18,954.80, 28,449.12 and 18,884.24

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Solution

The fourth proportional to 18,954.80, 28,449.12 and 18,884.24 is: 28,343.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,954.80 : 28,449.12 = 18,884.24 : x
  2. Step 2: Convert to fraction form
    18,954.80/28,449.12 = 18,884.24/x
  3. Step 3: Cross multiply
    18,954.80x = 28,449.12 × 18,884.24
  4. Step 4: Simplify right side
    18,954.80x = 537,240,009.87
  5. Step 5: Solve for x
    x = 537,240,009.87/18,954.80
  6. Step 6: Final answer
    x = 28,343.22

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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.