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Finding the Fourth Proportional to 18,986.63, 28,497.32 and 9,633.11

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Solution

The fourth proportional to 18,986.63, 28,497.32 and 9,633.11 is: 14,458.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,986.63 : 28,497.32 = 9,633.11 : x
  2. Step 2: Convert to fraction form
    18,986.63/28,497.32 = 9,633.11/x
  3. Step 3: Cross multiply
    18,986.63x = 28,497.32 × 9,633.11
  4. Step 4: Simplify right side
    18,986.63x = 274,517,627.61
  5. Step 5: Solve for x
    x = 274,517,627.61/18,986.63
  6. Step 6: Final answer
    x = 14,458.47

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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.