Home / 20,666.88-30,969.54-18,331.65

Finding the Fourth Proportional to 20,666.88, 30,969.54 and 18,331.65

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Solution

The fourth proportional to 20,666.88, 30,969.54 and 18,331.65 is: 27,470.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,666.88 : 30,969.54 = 18,331.65 : x
  2. Step 2: Convert to fraction form
    20,666.88/30,969.54 = 18,331.65/x
  3. Step 3: Cross multiply
    20,666.88x = 30,969.54 × 18,331.65
  4. Step 4: Simplify right side
    20,666.88x = 567,722,767.94
  5. Step 5: Solve for x
    x = 567,722,767.94/20,666.88
  6. Step 6: Final answer
    x = 27,470.17

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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.