Home / 20,823.89-31,215.78-7,669.08

Finding the Fourth Proportional to 20,823.89, 31,215.78 and 7,669.08

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Solution

The fourth proportional to 20,823.89, 31,215.78 and 7,669.08 is: 11,496.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,823.89 : 31,215.78 = 7,669.08 : x
  2. Step 2: Convert to fraction form
    20,823.89/31,215.78 = 7,669.08/x
  3. Step 3: Cross multiply
    20,823.89x = 31,215.78 × 7,669.08
  4. Step 4: Simplify right side
    20,823.89x = 239,396,314.08
  5. Step 5: Solve for x
    x = 239,396,314.08/20,823.89
  6. Step 6: Final answer
    x = 11,496.24

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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.