Home / 5,129.78-7,699.55-2,666.39

Finding the Fourth Proportional to 5,129.78, 7,699.55 and 2,666.39

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Solution

The fourth proportional to 5,129.78, 7,699.55 and 2,666.39 is: 4,002.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,129.78 : 7,699.55 = 2,666.39 : x
  2. Step 2: Convert to fraction form
    5,129.78/7,699.55 = 2,666.39/x
  3. Step 3: Cross multiply
    5,129.78x = 7,699.55 × 2,666.39
  4. Step 4: Simplify right side
    5,129.78x = 20,529,951.29
  5. Step 5: Solve for x
    x = 20,529,951.29/5,129.78
  6. Step 6: Final answer
    x = 4,002.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.