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Finding the Fourth Proportional to 18,707.89, 28,037.59 and 7,601.67

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Solution

The fourth proportional to 18,707.89, 28,037.59 and 7,601.67 is: 11,392.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,707.89 : 28,037.59 = 7,601.67 : x
  2. Step 2: Convert to fraction form
    18,707.89/28,037.59 = 7,601.67/x
  3. Step 3: Cross multiply
    18,707.89x = 28,037.59 × 7,601.67
  4. Step 4: Simplify right side
    18,707.89x = 213,132,609.39
  5. Step 5: Solve for x
    x = 213,132,609.39/18,707.89
  6. Step 6: Final answer
    x = 11,392.66

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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.