Home / 20,135.79-27,776.20-18,710.31

Finding the Fourth Proportional to 20,135.79, 27,776.20 and 18,710.31

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Solution

The fourth proportional to 20,135.79, 27,776.20 and 18,710.31 is: 25,809.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,135.79 : 27,776.20 = 18,710.31 : x
  2. Step 2: Convert to fraction form
    20,135.79/27,776.20 = 18,710.31/x
  3. Step 3: Cross multiply
    20,135.79x = 27,776.20 × 18,710.31
  4. Step 4: Simplify right side
    20,135.79x = 519,701,405.09
  5. Step 5: Solve for x
    x = 519,701,405.09/20,135.79
  6. Step 6: Final answer
    x = 25,809.83

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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.