Home / 20,905.62-31,359.65-6,114.21

Finding the Fourth Proportional to 20,905.62, 31,359.65 and 6,114.21

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Solution

The fourth proportional to 20,905.62, 31,359.65 and 6,114.21 is: 9,171.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,905.62 : 31,359.65 = 6,114.21 : x
  2. Step 2: Convert to fraction form
    20,905.62/31,359.65 = 6,114.21/x
  3. Step 3: Cross multiply
    20,905.62x = 31,359.65 × 6,114.21
  4. Step 4: Simplify right side
    20,905.62x = 191,739,455.06
  5. Step 5: Solve for x
    x = 191,739,455.06/20,905.62
  6. Step 6: Final answer
    x = 9,171.67

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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.