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Finding the Fourth Proportional to 5,129.86, 7,072.82 and 4,279.50

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Solution

The fourth proportional to 5,129.86, 7,072.82 and 4,279.50 is: 5,900.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,129.86 : 7,072.82 = 4,279.50 : x
  2. Step 2: Convert to fraction form
    5,129.86/7,072.82 = 4,279.50/x
  3. Step 3: Cross multiply
    5,129.86x = 7,072.82 × 4,279.50
  4. Step 4: Simplify right side
    5,129.86x = 30,268,133.19
  5. Step 5: Solve for x
    x = 30,268,133.19/5,129.86
  6. Step 6: Final answer
    x = 5,900.38

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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.