Home / 20,905.48-31,361.14-6,115.50

Finding the Fourth Proportional to 20,905.48, 31,361.14 and 6,115.50

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Solution

The fourth proportional to 20,905.48, 31,361.14 and 6,115.50 is: 9,174.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,905.48 : 31,361.14 = 6,115.50 : x
  2. Step 2: Convert to fraction form
    20,905.48/31,361.14 = 6,115.50/x
  3. Step 3: Cross multiply
    20,905.48x = 31,361.14 × 6,115.50
  4. Step 4: Simplify right side
    20,905.48x = 191,789,051.67
  5. Step 5: Solve for x
    x = 191,789,051.67/20,905.48
  6. Step 6: Final answer
    x = 9,174.10

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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.