Home / 20,861.13-31,295.78-9,174.31

Finding the Fourth Proportional to 20,861.13, 31,295.78 and 9,174.31

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Solution

The fourth proportional to 20,861.13, 31,295.78 and 9,174.31 is: 13,763.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,861.13 : 31,295.78 = 9,174.31 : x
  2. Step 2: Convert to fraction form
    20,861.13/31,295.78 = 9,174.31/x
  3. Step 3: Cross multiply
    20,861.13x = 31,295.78 × 9,174.31
  4. Step 4: Simplify right side
    20,861.13x = 287,117,187.41
  5. Step 5: Solve for x
    x = 287,117,187.41/20,861.13
  6. Step 6: Final answer
    x = 13,763.26

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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.