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Finding the Fourth Proportional to 20,477.70, 30,715.08 and 7,995.38

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Solution

The fourth proportional to 20,477.70, 30,715.08 and 7,995.38 is: 11,992.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,477.70 : 30,715.08 = 7,995.38 : x
  2. Step 2: Convert to fraction form
    20,477.70/30,715.08 = 7,995.38/x
  3. Step 3: Cross multiply
    20,477.70x = 30,715.08 × 7,995.38
  4. Step 4: Simplify right side
    20,477.70x = 245,578,736.33
  5. Step 5: Solve for x
    x = 245,578,736.33/20,477.70
  6. Step 6: Final answer
    x = 11,992.50

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Double scale
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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.