Home / 20,757.66-28,637.34-12,786.06

Finding the Fourth Proportional to 20,757.66, 28,637.34 and 12,786.06

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Solution

The fourth proportional to 20,757.66, 28,637.34 and 12,786.06 is: 17,639.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,757.66 : 28,637.34 = 12,786.06 : x
  2. Step 2: Convert to fraction form
    20,757.66/28,637.34 = 12,786.06/x
  3. Step 3: Cross multiply
    20,757.66x = 28,637.34 × 12,786.06
  4. Step 4: Simplify right side
    20,757.66x = 366,158,747.48
  5. Step 5: Solve for x
    x = 366,158,747.48/20,757.66
  6. Step 6: Final answer
    x = 17,639.69

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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.