Home / 21,235.86-31,769.96-18,742.68

Finding the Fourth Proportional to 21,235.86, 31,769.96 and 18,742.68

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Solution

The fourth proportional to 21,235.86, 31,769.96 and 18,742.68 is: 28,040.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,235.86 : 31,769.96 = 18,742.68 : x
  2. Step 2: Convert to fraction form
    21,235.86/31,769.96 = 18,742.68/x
  3. Step 3: Cross multiply
    21,235.86x = 31,769.96 × 18,742.68
  4. Step 4: Simplify right side
    21,235.86x = 595,454,100.18
  5. Step 5: Solve for x
    x = 595,454,100.18/21,235.86
  6. Step 6: Final answer
    x = 28,040.03

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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.