Home / 20,889.31-31,353.85-12,967.85

Finding the Fourth Proportional to 20,889.31, 31,353.85 and 12,967.85

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Solution

The fourth proportional to 20,889.31, 31,353.85 and 12,967.85 is: 19,464.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,889.31 : 31,353.85 = 12,967.85 : x
  2. Step 2: Convert to fraction form
    20,889.31/31,353.85 = 12,967.85/x
  3. Step 3: Cross multiply
    20,889.31x = 31,353.85 × 12,967.85
  4. Step 4: Simplify right side
    20,889.31x = 406,591,969.31
  5. Step 5: Solve for x
    x = 406,591,969.31/20,889.31
  6. Step 6: Final answer
    x = 19,464.12

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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.