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Finding the Fourth Proportional to 18,968.55, 28,454.21 and 7,281.77

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Solution

The fourth proportional to 18,968.55, 28,454.21 and 7,281.77 is: 10,923.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,968.55 : 28,454.21 = 7,281.77 : x
  2. Step 2: Convert to fraction form
    18,968.55/28,454.21 = 7,281.77/x
  3. Step 3: Cross multiply
    18,968.55x = 28,454.21 × 7,281.77
  4. Step 4: Simplify right side
    18,968.55x = 207,197,121.94
  5. Step 5: Solve for x
    x = 207,197,121.94/18,968.55
  6. Step 6: Final answer
    x = 10,923.19

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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.