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Finding the Fourth Proportional to 18,737.57, 28,106.73 and 7,636.57

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Solution

The fourth proportional to 18,737.57, 28,106.73 and 7,636.57 is: 11,455.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,737.57 : 28,106.73 = 7,636.57 : x
  2. Step 2: Convert to fraction form
    18,737.57/28,106.73 = 7,636.57/x
  3. Step 3: Cross multiply
    18,737.57x = 28,106.73 × 7,636.57
  4. Step 4: Simplify right side
    18,737.57x = 214,639,011.12
  5. Step 5: Solve for x
    x = 214,639,011.12/18,737.57
  6. Step 6: Final answer
    x = 11,455.01

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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.