Home / 20,783.10-28,673.57-11,828.36

Finding the Fourth Proportional to 20,783.10, 28,673.57 and 11,828.36

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Solution

The fourth proportional to 20,783.10, 28,673.57 and 11,828.36 is: 16,319.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,783.10 : 28,673.57 = 11,828.36 : x
  2. Step 2: Convert to fraction form
    20,783.10/28,673.57 = 11,828.36/x
  3. Step 3: Cross multiply
    20,783.10x = 28,673.57 × 11,828.36
  4. Step 4: Simplify right side
    20,783.10x = 339,161,320.99
  5. Step 5: Solve for x
    x = 339,161,320.99/20,783.10
  6. Step 6: Final answer
    x = 16,319.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.