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Finding the Fourth Proportional to 18,487.70, 25,518.25 and 10,936.65

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Solution

The fourth proportional to 18,487.70, 25,518.25 and 10,936.65 is: 15,095.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,487.70 : 25,518.25 = 10,936.65 : x
  2. Step 2: Convert to fraction form
    18,487.70/25,518.25 = 10,936.65/x
  3. Step 3: Cross multiply
    18,487.70x = 25,518.25 × 10,936.65
  4. Step 4: Simplify right side
    18,487.70x = 279,084,196.20
  5. Step 5: Solve for x
    x = 279,084,196.20/18,487.70
  6. Step 6: Final answer
    x = 15,095.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.