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Finding the Fourth Proportional to 5,720.91, 7,895.79 and 3,421.14

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Solution

The fourth proportional to 5,720.91, 7,895.79 and 3,421.14 is: 4,721.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,720.91 : 7,895.79 = 3,421.14 : x
  2. Step 2: Convert to fraction form
    5,720.91/7,895.79 = 3,421.14/x
  3. Step 3: Cross multiply
    5,720.91x = 7,895.79 × 3,421.14
  4. Step 4: Simplify right side
    5,720.91x = 27,012,597.08
  5. Step 5: Solve for x
    x = 27,012,597.08/5,720.91
  6. Step 6: Final answer
    x = 4,721.73

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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.