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Finding the Fourth Proportional to 5,659.30, 7,809.92 and 3,420.87

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Solution

The fourth proportional to 5,659.30, 7,809.92 and 3,420.87 is: 4,720.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,659.30 : 7,809.92 = 3,420.87 : x
  2. Step 2: Convert to fraction form
    5,659.30/7,809.92 = 3,420.87/x
  3. Step 3: Cross multiply
    5,659.30x = 7,809.92 × 3,420.87
  4. Step 4: Simplify right side
    5,659.30x = 26,716,721.03
  5. Step 5: Solve for x
    x = 26,716,721.03/5,659.30
  6. Step 6: Final answer
    x = 4,720.85

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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.