Home / 20,865.31-31,276.09-7,709.29

Finding the Fourth Proportional to 20,865.31, 31,276.09 and 7,709.29

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Solution

The fourth proportional to 20,865.31, 31,276.09 and 7,709.29 is: 11,555.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,865.31 : 31,276.09 = 7,709.29 : x
  2. Step 2: Convert to fraction form
    20,865.31/31,276.09 = 7,709.29/x
  3. Step 3: Cross multiply
    20,865.31x = 31,276.09 × 7,709.29
  4. Step 4: Simplify right side
    20,865.31x = 241,116,379.32
  5. Step 5: Solve for x
    x = 241,116,379.32/20,865.31
  6. Step 6: Final answer
    x = 11,555.85

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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.