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Finding the Fourth Proportional to 5,129.60, 7,126.40 and 5,081.60

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Solution

The fourth proportional to 5,129.60, 7,126.40 and 5,081.60 is: 7,059.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,129.60 : 7,126.40 = 5,081.60 : x
  2. Step 2: Convert to fraction form
    5,129.60/7,126.40 = 5,081.60/x
  3. Step 3: Cross multiply
    5,129.60x = 7,126.40 × 5,081.60
  4. Step 4: Simplify right side
    5,129.60x = 36,213,514.24
  5. Step 5: Solve for x
    x = 36,213,514.24/5,129.60
  6. Step 6: Final answer
    x = 7,059.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.