Home / 5,619.40-8,430.18-2,156.38

Finding the Fourth Proportional to 5,619.40, 8,430.18 and 2,156.38

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Solution

The fourth proportional to 5,619.40, 8,430.18 and 2,156.38 is: 3,234.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,619.40 : 8,430.18 = 2,156.38 : x
  2. Step 2: Convert to fraction form
    5,619.40/8,430.18 = 2,156.38/x
  3. Step 3: Cross multiply
    5,619.40x = 8,430.18 × 2,156.38
  4. Step 4: Simplify right side
    5,619.40x = 18,178,629.40
  5. Step 5: Solve for x
    x = 18,178,629.40/5,619.40
  6. Step 6: Final answer
    x = 3,234.98

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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.