Home / 20,783.69-31,169.31-10,917.59

Finding the Fourth Proportional to 20,783.69, 31,169.31 and 10,917.59

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Solution

The fourth proportional to 20,783.69, 31,169.31 and 10,917.59 is: 16,373.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,783.69 : 31,169.31 = 10,917.59 : x
  2. Step 2: Convert to fraction form
    20,783.69/31,169.31 = 10,917.59/x
  3. Step 3: Cross multiply
    20,783.69x = 31,169.31 × 10,917.59
  4. Step 4: Simplify right side
    20,783.69x = 340,293,550.38
  5. Step 5: Solve for x
    x = 340,293,550.38/20,783.69
  6. Step 6: Final answer
    x = 16,373.11

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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.