Home / 20,215.50-30,318.36-6,171.72

Finding the Fourth Proportional to 20,215.50, 30,318.36 and 6,171.72

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Solution

The fourth proportional to 20,215.50, 30,318.36 and 6,171.72 is: 9,256.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,215.50 : 30,318.36 = 6,171.72 : x
  2. Step 2: Convert to fraction form
    20,215.50/30,318.36 = 6,171.72/x
  3. Step 3: Cross multiply
    20,215.50x = 30,318.36 × 6,171.72
  4. Step 4: Simplify right side
    20,215.50x = 187,116,428.78
  5. Step 5: Solve for x
    x = 187,116,428.78/20,215.50
  6. Step 6: Final answer
    x = 9,256.09

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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.