Home / 5,378.72-8,070.24-2,782.40

Finding the Fourth Proportional to 5,378.72, 8,070.24 and 2,782.40

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Solution

The fourth proportional to 5,378.72, 8,070.24 and 2,782.40 is: 4,174.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,378.72 : 8,070.24 = 2,782.40 : x
  2. Step 2: Convert to fraction form
    5,378.72/8,070.24 = 2,782.40/x
  3. Step 3: Cross multiply
    5,378.72x = 8,070.24 × 2,782.40
  4. Step 4: Simplify right side
    5,378.72x = 22,454,635.78
  5. Step 5: Solve for x
    x = 22,454,635.78/5,378.72
  6. Step 6: Final answer
    x = 4,174.72

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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.