Home / 20,669.76-31,022.58-11,318.28

Finding the Fourth Proportional to 20,669.76, 31,022.58 and 11,318.28

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Solution

The fourth proportional to 20,669.76, 31,022.58 and 11,318.28 is: 16,987.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,669.76 : 31,022.58 = 11,318.28 : x
  2. Step 2: Convert to fraction form
    20,669.76/31,022.58 = 11,318.28/x
  3. Step 3: Cross multiply
    20,669.76x = 31,022.58 × 11,318.28
  4. Step 4: Simplify right side
    20,669.76x = 351,122,246.76
  5. Step 5: Solve for x
    x = 351,122,246.76/20,669.76
  6. Step 6: Final answer
    x = 16,987.24

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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.