Home / 5,128.40-7,077.30-2,859.88

Finding the Fourth Proportional to 5,128.40, 7,077.30 and 2,859.88

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Solution

The fourth proportional to 5,128.40, 7,077.30 and 2,859.88 is: 3,946.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,128.40 : 7,077.30 = 2,859.88 : x
  2. Step 2: Convert to fraction form
    5,128.40/7,077.30 = 2,859.88/x
  3. Step 3: Cross multiply
    5,128.40x = 7,077.30 × 2,859.88
  4. Step 4: Simplify right side
    5,128.40x = 20,240,228.72
  5. Step 5: Solve for x
    x = 20,240,228.72/5,128.40
  6. Step 6: Final answer
    x = 3,946.69

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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.