Home / 18,715.54-28,056.78-7,631.50

Finding the Fourth Proportional to 18,715.54, 28,056.78 and 7,631.50

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Solution

The fourth proportional to 18,715.54, 28,056.78 and 7,631.50 is: 11,440.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,715.54 : 28,056.78 = 7,631.50 : x
  2. Step 2: Convert to fraction form
    18,715.54/28,056.78 = 7,631.50/x
  3. Step 3: Cross multiply
    18,715.54x = 28,056.78 × 7,631.50
  4. Step 4: Simplify right side
    18,715.54x = 214,115,316.57
  5. Step 5: Solve for x
    x = 214,115,316.57/18,715.54
  6. Step 6: Final answer
    x = 11,440.51

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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.