Home / 20,437.98-30,678.42-18,112.86

Finding the Fourth Proportional to 20,437.98, 30,678.42 and 18,112.86

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Solution

The fourth proportional to 20,437.98, 30,678.42 and 18,112.86 is: 27,188.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,437.98 : 30,678.42 = 18,112.86 : x
  2. Step 2: Convert to fraction form
    20,437.98/30,678.42 = 18,112.86/x
  3. Step 3: Cross multiply
    20,437.98x = 30,678.42 × 18,112.86
  4. Step 4: Simplify right side
    20,437.98x = 555,673,926.48
  5. Step 5: Solve for x
    x = 555,673,926.48/20,437.98
  6. Step 6: Final answer
    x = 27,188.30

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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.