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Finding the Fourth Proportional to 18,737.99, 28,082.61 and 7,631.67

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Solution

The fourth proportional to 18,737.99, 28,082.61 and 7,631.67 is: 11,437.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,737.99 : 28,082.61 = 7,631.67 : x
  2. Step 2: Convert to fraction form
    18,737.99/28,082.61 = 7,631.67/x
  3. Step 3: Cross multiply
    18,737.99x = 28,082.61 × 7,631.67
  4. Step 4: Simplify right side
    18,737.99x = 214,317,212.26
  5. Step 5: Solve for x
    x = 214,317,212.26/18,737.99
  6. Step 6: Final answer
    x = 11,437.58

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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.