Home / 7,900.08-11,842.20-5,128.56

Finding the Fourth Proportional to 7,900.08, 11,842.20 and 5,128.56

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Solution

The fourth proportional to 7,900.08, 11,842.20 and 5,128.56 is: 7,687.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,900.08 : 11,842.20 = 5,128.56 : x
  2. Step 2: Convert to fraction form
    7,900.08/11,842.20 = 5,128.56/x
  3. Step 3: Cross multiply
    7,900.08x = 11,842.20 × 5,128.56
  4. Step 4: Simplify right side
    7,900.08x = 60,733,433.23
  5. Step 5: Solve for x
    x = 60,733,433.23/7,900.08
  6. Step 6: Final answer
    x = 7,687.70

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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.