Home / 5,160.79-7,121.90-2,802.88

Finding the Fourth Proportional to 5,160.79, 7,121.90 and 2,802.88

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Solution

The fourth proportional to 5,160.79, 7,121.90 and 2,802.88 is: 3,867.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,160.79 : 7,121.90 = 2,802.88 : x
  2. Step 2: Convert to fraction form
    5,160.79/7,121.90 = 2,802.88/x
  3. Step 3: Cross multiply
    5,160.79x = 7,121.90 × 2,802.88
  4. Step 4: Simplify right side
    5,160.79x = 19,961,838.08
  5. Step 5: Solve for x
    x = 19,961,838.08/5,160.79
  6. Step 6: Final answer
    x = 3,867.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.