Home / 18,976.13-26,189.28-15,783.80

Finding the Fourth Proportional to 18,976.13, 26,189.28 and 15,783.80

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Solution

The fourth proportional to 18,976.13, 26,189.28 and 15,783.80 is: 21,783.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,976.13 : 26,189.28 = 15,783.80 : x
  2. Step 2: Convert to fraction form
    18,976.13/26,189.28 = 15,783.80/x
  3. Step 3: Cross multiply
    18,976.13x = 26,189.28 × 15,783.80
  4. Step 4: Simplify right side
    18,976.13x = 413,366,226.72
  5. Step 5: Solve for x
    x = 413,366,226.72/18,976.13
  6. Step 6: Final answer
    x = 21,783.48

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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.