Home / 20,465.92-30,705.36-7,318

Finding the Fourth Proportional to 20,465.92, 30,705.36 and 7,318

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Solution

The fourth proportional to 20,465.92, 30,705.36 and 7,318 is: 10,979.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,465.92 : 30,705.36 = 7,318 : x
  2. Step 2: Convert to fraction form
    20,465.92/30,705.36 = 7,318/x
  3. Step 3: Cross multiply
    20,465.92x = 30,705.36 × 7,318
  4. Step 4: Simplify right side
    20,465.92x = 224,701,824.48
  5. Step 5: Solve for x
    x = 224,701,824.48/20,465.92
  6. Step 6: Final answer
    x = 10,979.32

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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.