Home / 5,239.10-7,856.55-2,118.50

Finding the Fourth Proportional to 5,239.10, 7,856.55 and 2,118.50

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Solution

The fourth proportional to 5,239.10, 7,856.55 and 2,118.50 is: 3,176.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,239.10 : 7,856.55 = 2,118.50 : x
  2. Step 2: Convert to fraction form
    5,239.10/7,856.55 = 2,118.50/x
  3. Step 3: Cross multiply
    5,239.10x = 7,856.55 × 2,118.50
  4. Step 4: Simplify right side
    5,239.10x = 16,644,120.82
  5. Step 5: Solve for x
    x = 16,644,120.82/5,239.10
  6. Step 6: Final answer
    x = 3,176.91

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1.5x scale

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.