Home / 5,128.35-7,077.15-2,890.26

Finding the Fourth Proportional to 5,128.35, 7,077.15 and 2,890.26

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Solution

The fourth proportional to 5,128.35, 7,077.15 and 2,890.26 is: 3,988.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,128.35 : 7,077.15 = 2,890.26 : x
  2. Step 2: Convert to fraction form
    5,128.35/7,077.15 = 2,890.26/x
  3. Step 3: Cross multiply
    5,128.35x = 7,077.15 × 2,890.26
  4. Step 4: Simplify right side
    5,128.35x = 20,454,803.56
  5. Step 5: Solve for x
    x = 20,454,803.56/5,128.35
  6. Step 6: Final answer
    x = 3,988.57

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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.