Home / 20,817.70-31,207.59-7,660.90

Finding the Fourth Proportional to 20,817.70, 31,207.59 and 7,660.90

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Solution

The fourth proportional to 20,817.70, 31,207.59 and 7,660.90 is: 11,484.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,817.70 : 31,207.59 = 7,660.90 : x
  2. Step 2: Convert to fraction form
    20,817.70/31,207.59 = 7,660.90/x
  3. Step 3: Cross multiply
    20,817.70x = 31,207.59 × 7,660.90
  4. Step 4: Simplify right side
    20,817.70x = 239,078,226.23
  5. Step 5: Solve for x
    x = 239,078,226.23/20,817.70
  6. Step 6: Final answer
    x = 11,484.37

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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.