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Finding the Fourth Proportional to 18,961.31, 28,403.88 and 9,444.96

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Solution

The fourth proportional to 18,961.31, 28,403.88 and 9,444.96 is: 14,148.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,961.31 : 28,403.88 = 9,444.96 : x
  2. Step 2: Convert to fraction form
    18,961.31/28,403.88 = 9,444.96/x
  3. Step 3: Cross multiply
    18,961.31x = 28,403.88 × 9,444.96
  4. Step 4: Simplify right side
    18,961.31x = 268,273,510.44
  5. Step 5: Solve for x
    x = 268,273,510.44/18,961.31
  6. Step 6: Final answer
    x = 14,148.47

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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.