Home / 5,239.20-7,856.88-2,160.16

Finding the Fourth Proportional to 5,239.20, 7,856.88 and 2,160.16

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Solution

The fourth proportional to 5,239.20, 7,856.88 and 2,160.16 is: 3,239.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,239.20 : 7,856.88 = 2,160.16 : x
  2. Step 2: Convert to fraction form
    5,239.20/7,856.88 = 2,160.16/x
  3. Step 3: Cross multiply
    5,239.20x = 7,856.88 × 2,160.16
  4. Step 4: Simplify right side
    5,239.20x = 16,972,117.90
  5. Step 5: Solve for x
    x = 16,972,117.90/5,239.20
  6. Step 6: Final answer
    x = 3,239.45

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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.