Home / 5,415.71-8,121.50-2,127

Finding the Fourth Proportional to 5,415.71, 8,121.50 and 2,127

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Solution

The fourth proportional to 5,415.71, 8,121.50 and 2,127 is: 3,189.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,415.71 : 8,121.50 = 2,127 : x
  2. Step 2: Convert to fraction form
    5,415.71/8,121.50 = 2,127/x
  3. Step 3: Cross multiply
    5,415.71x = 8,121.50 × 2,127
  4. Step 4: Simplify right side
    5,415.71x = 17,274,430.50
  5. Step 5: Solve for x
    x = 17,274,430.50/5,415.71
  6. Step 6: Final answer
    x = 3,189.69

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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.