Home / 5,407.20-8,112-4,591.20

Finding the Fourth Proportional to 5,407.20, 8,112 and 4,591.20

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Solution

The fourth proportional to 5,407.20, 8,112 and 4,591.20 is: 6,887.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,407.20 : 8,112 = 4,591.20 : x
  2. Step 2: Convert to fraction form
    5,407.20/8,112 = 4,591.20/x
  3. Step 3: Cross multiply
    5,407.20x = 8,112 × 4,591.20
  4. Step 4: Simplify right side
    5,407.20x = 37,243,814.40
  5. Step 5: Solve for x
    x = 37,243,814.40/5,407.20
  6. Step 6: Final answer
    x = 6,887.82

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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.