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Finding the Fourth Proportional to 7,900.74, 11,855.43 and 4,005.45

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Solution

The fourth proportional to 7,900.74, 11,855.43 and 4,005.45 is: 6,010.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,900.74 : 11,855.43 = 4,005.45 : x
  2. Step 2: Convert to fraction form
    7,900.74/11,855.43 = 4,005.45/x
  3. Step 3: Cross multiply
    7,900.74x = 11,855.43 × 4,005.45
  4. Step 4: Simplify right side
    7,900.74x = 47,486,332.09
  5. Step 5: Solve for x
    x = 47,486,332.09/7,900.74
  6. Step 6: Final answer
    x = 6,010.37

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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.