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Finding the Fourth Proportional to 20,615.05, 30,925.02 and 7,285.28

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Solution

The fourth proportional to 20,615.05, 30,925.02 and 7,285.28 is: 10,928.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,615.05 : 30,925.02 = 7,285.28 : x
  2. Step 2: Convert to fraction form
    20,615.05/30,925.02 = 7,285.28/x
  3. Step 3: Cross multiply
    20,615.05x = 30,925.02 × 7,285.28
  4. Step 4: Simplify right side
    20,615.05x = 225,297,429.71
  5. Step 5: Solve for x
    x = 225,297,429.71/20,615.05
  6. Step 6: Final answer
    x = 10,928.78

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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.