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Finding the Fourth Proportional to 18,944.64, 28,440.48 and 12,624.96

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Solution

The fourth proportional to 18,944.64, 28,440.48 and 12,624.96 is: 18,953.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,944.64 : 28,440.48 = 12,624.96 : x
  2. Step 2: Convert to fraction form
    18,944.64/28,440.48 = 12,624.96/x
  3. Step 3: Cross multiply
    18,944.64x = 28,440.48 × 12,624.96
  4. Step 4: Simplify right side
    18,944.64x = 359,059,922.38
  5. Step 5: Solve for x
    x = 359,059,922.38/18,944.64
  6. Step 6: Final answer
    x = 18,953.11

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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.