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Finding the Fourth Proportional to 18,882.21, 28,323.18 and 4,842.21

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Solution

The fourth proportional to 18,882.21, 28,323.18 and 4,842.21 is: 7,263.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,882.21 : 28,323.18 = 4,842.21 : x
  2. Step 2: Convert to fraction form
    18,882.21/28,323.18 = 4,842.21/x
  3. Step 3: Cross multiply
    18,882.21x = 28,323.18 × 4,842.21
  4. Step 4: Simplify right side
    18,882.21x = 137,146,785.43
  5. Step 5: Solve for x
    x = 137,146,785.43/18,882.21
  6. Step 6: Final answer
    x = 7,263.28

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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.