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Finding the Fourth Proportional to 5,085.68, 7,018 and 2,847.84

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Solution

The fourth proportional to 5,085.68, 7,018 and 2,847.84 is: 3,929.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,085.68 : 7,018 = 2,847.84 : x
  2. Step 2: Convert to fraction form
    5,085.68/7,018 = 2,847.84/x
  3. Step 3: Cross multiply
    5,085.68x = 7,018 × 2,847.84
  4. Step 4: Simplify right side
    5,085.68x = 19,986,141.12
  5. Step 5: Solve for x
    x = 19,986,141.12/5,085.68
  6. Step 6: Final answer
    x = 3,929.89

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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.