Home / 5,406.40-8,108.52-2,807.92

Finding the Fourth Proportional to 5,406.40, 8,108.52 and 2,807.92

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Solution

The fourth proportional to 5,406.40, 8,108.52 and 2,807.92 is: 4,211.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,406.40 : 8,108.52 = 2,807.92 : x
  2. Step 2: Convert to fraction form
    5,406.40/8,108.52 = 2,807.92/x
  3. Step 3: Cross multiply
    5,406.40x = 8,108.52 × 2,807.92
  4. Step 4: Simplify right side
    5,406.40x = 22,768,075.48
  5. Step 5: Solve for x
    x = 22,768,075.48/5,406.40
  6. Step 6: Final answer
    x = 4,211.32

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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.