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Finding the Fourth Proportional to 21,000.67, 31,507.69 and 6,209.67

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Solution

The fourth proportional to 21,000.67, 31,507.69 and 6,209.67 is: 9,316.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,000.67 : 31,507.69 = 6,209.67 : x
  2. Step 2: Convert to fraction form
    21,000.67/31,507.69 = 6,209.67/x
  3. Step 3: Cross multiply
    21,000.67x = 31,507.69 × 6,209.67
  4. Step 4: Simplify right side
    21,000.67x = 195,652,357.36
  5. Step 5: Solve for x
    x = 195,652,357.36/21,000.67
  6. Step 6: Final answer
    x = 9,316.48

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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.